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1.
Mahajan, Madhurika.
Some Studies on Circular and Annular Ring Microstrip
Antennas;.
Degree: 2013, Jaypee University of Information Technology, Solan
URL: http://shodhganga.inflibnet.ac.in/handle/10603/11155
► Microstrip antennas are the class of antennas, which are widely used in GPS (Global Positioning system), SDARS (Satellite Digital Audio Radio Services), and WLAN (Wireless…
(more)
▼ Microstrip antennas are the class of antennas,
which are widely used in GPS (Global Positioning system), SDARS
(Satellite Digital Audio Radio Services), and WLAN (Wireless Local
Area Networks). Modern communication systems often require compact
antennas at low cost. Due to the lightweight microstrip antennas
are well suited for airborne applications. In some applications
operation at two or more discrete bands is desired with an
arbitrary separation of bands. Further all the bands may be
required to have the same polarization, radiation pattern and input
impedance. It may not be possible to achieve these objectives from
the basic microstrip antennas having regular shapes. These
applications can be obtained by suitably loading the regular
microstrip structures. newline In this thesis, a new analytical
model is developed for antennas. The cavity model is simplest of
all the models, which are used for the analysis of microstrip
antennas. This model is also the approximate model, which leads to
reactive input impedance and does not radiate any power. Thus the
cavity model is used to predict frequency, input impedance and
other important parameters of circular disc antenna, stacked
antenna and ring antenna. newline Cavity model with circuital
analysis is used for the development of these models. Firstly a
circular disc antenna with coaxial feeding is analyzed. Different
parameters of the circular disc antenna are obtained. The analysis
is further extended to stacked circular disc antennas. The
bandwidth and gain both are enhanced by stacking the antenna. It is
observed that the stacking of elements input impedance is
considerably reduced to the feed line impedance (50 ohms) or near
it. newline
Advisors/Committee Members: Khah, Sunil Kumar.
Subjects/Keywords: Annular Ring Antenna; Microstrip Antenna
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APA (6th Edition):
Mahajan, M. (2013). Some Studies on Circular and Annular Ring Microstrip
Antennas;. (Thesis). Jaypee University of Information Technology, Solan. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/11155
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mahajan, Madhurika. “Some Studies on Circular and Annular Ring Microstrip
Antennas;.” 2013. Thesis, Jaypee University of Information Technology, Solan. Accessed March 04, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/11155.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mahajan, Madhurika. “Some Studies on Circular and Annular Ring Microstrip
Antennas;.” 2013. Web. 04 Mar 2021.
Vancouver:
Mahajan M. Some Studies on Circular and Annular Ring Microstrip
Antennas;. [Internet] [Thesis]. Jaypee University of Information Technology, Solan; 2013. [cited 2021 Mar 04].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11155.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mahajan M. Some Studies on Circular and Annular Ring Microstrip
Antennas;. [Thesis]. Jaypee University of Information Technology, Solan; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11155
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Liu, Ya-Chi.
Design, Modeling and Numerical Analysis of Microwave and Optical Devices: The Multi-band Patch Antenna, Ultra Wideband Ring Filter and Plasmonic Waveguide Coupler.
Degree: 2014, Texas Digital Library
URL: http://hdl.handle.net/1969;
http://hdl.handle.net/2249.1/66835
► In this dissertation, three different devices are studied and devised for the applications in microwave and optical communication: (1) Multiband Patch Antenna, (2) Ultra-Wideband Band…
(more)
▼ In this dissertation, three different devices are studied and devised for the applications in microwave and optical communication: (1) Multiband Patch
Antenna, (2) Ultra-Wideband Band Pass Ring Filter and (3) Plasmonic Waveguide Coupler. The fundamental theory and design ideas are described in each chapter. It is shown that the simulation and measurement results are in good agreement for the designed patch
antenna and band pass filter. Finally, the simulation outcomes for the plasmonic waveguide coupler validate the proposed idea imposing the corrugated waveguide as the photonic-to-plasmonic mode converter.
Finally, it has to be clarified that, for the consideration of intellectual proprietary, some details of current undergoing researches are not included in this dissertation. These works will be depicted in future publications when the final piece is completed.
Advisors/Committee Members: Chang, Kai (advisor).
Subjects/Keywords: Patch Antenna
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APA ·
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to Zotero / EndNote / Reference
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APA (6th Edition):
Liu, Y. (2014). Design, Modeling and Numerical Analysis of Microwave and Optical Devices: The Multi-band Patch Antenna, Ultra Wideband Ring Filter and Plasmonic Waveguide Coupler. (Thesis). Texas Digital Library. Retrieved from http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66835
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Liu, Ya-Chi. “Design, Modeling and Numerical Analysis of Microwave and Optical Devices: The Multi-band Patch Antenna, Ultra Wideband Ring Filter and Plasmonic Waveguide Coupler.” 2014. Thesis, Texas Digital Library. Accessed March 04, 2021.
http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66835.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Ya-Chi. “Design, Modeling and Numerical Analysis of Microwave and Optical Devices: The Multi-band Patch Antenna, Ultra Wideband Ring Filter and Plasmonic Waveguide Coupler.” 2014. Web. 04 Mar 2021.
Vancouver:
Liu Y. Design, Modeling and Numerical Analysis of Microwave and Optical Devices: The Multi-band Patch Antenna, Ultra Wideband Ring Filter and Plasmonic Waveguide Coupler. [Internet] [Thesis]. Texas Digital Library; 2014. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66835.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liu Y. Design, Modeling and Numerical Analysis of Microwave and Optical Devices: The Multi-band Patch Antenna, Ultra Wideband Ring Filter and Plasmonic Waveguide Coupler. [Thesis]. Texas Digital Library; 2014. Available from: http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66835
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
3.
Yue, Taiwei.
ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.
Degree: 2018, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/15459txy143
► In this dissertation, the design, analysis, and demonstration of multiple advanced compact and low-profile antennas with enhanced functionalities are presented with operational frequency bands ranging…
(more)
▼ In this dissertation, the design, analysis, and demonstration of multiple advanced compact and low-profile antennas with enhanced functionalities are presented with operational frequency bands ranging from microwave frequencies to the terahertz regime. Basic background knowledge is reviewed first in Chapter 1. In Chapter 2, three single-band antennas with compact sizes operating in the 4.0 GHz band are proposed. Specifically, the first two designs are linearly-polarized (LP) antennas with fractional bandwidths of more than 10% and unidirectional radiation patterns. The third design in Chapter 2 is a circularly-polarized (CP)
antenna with an operational bandwidth exceeding 9% and a unidirectional radiation pattern. In Chapter 3, the design methodology of a dual-band
antenna is introduced. The proposed LP
antenna functions at both the 1.9 and 2.5 GHz frequency bands with unidirectional radiating characteristics. An ultra-compact footprint is achieved by the proposed
antenna by virtue of rectangular complementary split ring resonator (CSRR) loadings, which also contributes to the dual-band functionality. In Chapter 4, a dual-band dual-sense CP
antenna that operates at 1.9 and 2.5 GHz is proposed. The bi-anisotropic characteristic of the circular CSRR resonators is utilized in
antenna engineering for the first time to realize the dual-band dual-sense CP radiation at broadside. Moreover, the size of the
antenna is smaller than most of its counterparts reported in the literature. In Chapter 5, a highly miniaturized wideband wearable
antenna with filtering characteristics is proposed for the 2.4 GHz industry, scientific, and medical (ISM) band based on the substrate-integrated-waveguide (SIW) technology. More importantly, the SIW structure is based on Eutectic Gallium-Indium (EGaIn) liquid metal and a flexible Styrene Ethylene Butylene Styrene (SEBS) polymer. This represents the first application of these flexible materials in
antenna engineering. In Chapter 6, compact optical nanoantennas, referred to as surface plasma (SP) wave generators in this dissertation, are introduced to realize the generation of reconfigurable directional SP waves. In summary, these antennas with miniaturized volumes and advanced functionalities are promising candidates for integration into various modern communication systems.
Advisors/Committee Members: Douglas Henry Werner, Dissertation Advisor/Co-Advisor, Douglas Henry Werner, Committee Chair/Co-Chair, Ram Mohan Narayanan, Committee Member, Pingjuan Li Werner, Committee Member, Ramakrishnan Rajagopalan, Outside Member.
Subjects/Keywords: Antenna; Metasurface
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yue, T. (2018). ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15459txy143
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yue, Taiwei. “ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.” 2018. Thesis, Penn State University. Accessed March 04, 2021.
https://submit-etda.libraries.psu.edu/catalog/15459txy143.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yue, Taiwei. “ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.” 2018. Web. 04 Mar 2021.
Vancouver:
Yue T. ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Mar 04].
Available from: https://submit-etda.libraries.psu.edu/catalog/15459txy143.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yue T. ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15459txy143
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg
4.
Van Wyk, Michael Antonie.
Toepassing van komplekse ruimtelike interpolasie in rignetantennes.
Degree: 2014, University of Johannesburg
URL: http://hdl.handle.net/10210/10902
► M.Ing. (Electrical & Electronic Engineering)
A new method is presented for significantly reducing the large number of complex computations associated with beamforming, -steering and adaption…
(more)
▼ M.Ing. (Electrical & Electronic Engineering)
A new method is presented for significantly reducing the large number of complex computations associated with beamforming, -steering and adaption in large antenna arrays. The structure is based on linear interpolation over (L +1) array elements implying that the (L -1) antenna or sensor signals in-between are added with simple weights to the neighbouring antenna signals for beamforming and/or steering. If L is chosen to be a power of two, these simple weights become h t, i, etc. or multiples thereof. It is easily implemented on a microcomputer with shift operations and can be performed in reduced time compared to byte and word multiplications. The maximum value of L that can be used increases with decreasing mainlobe width. A problem that arises when performing beam steering on such an array is that the level of the sidelobes-more specifically the suppressed mainlobe images which are the result of the interpolation process-increase with increasing steering angle. The maximum.steering angle is determined by the constraints placed on the sidelobe level. To be able to steer wider than the maximum steering angle, it becomes necessary to apply complex interpolation to the array. Complex interpolation refers to the steering of the interpolator beam. The interpolation process reduces the number of weights. This results in a significant reduction of the number of computations associated with adaptive beamforming algorithms.
Subjects/Keywords: Antenna arrays
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Van Wyk, M. A. (2014). Toepassing van komplekse ruimtelike interpolasie in rignetantennes. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/10902
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Van Wyk, Michael Antonie. “Toepassing van komplekse ruimtelike interpolasie in rignetantennes.” 2014. Thesis, University of Johannesburg. Accessed March 04, 2021.
http://hdl.handle.net/10210/10902.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Van Wyk, Michael Antonie. “Toepassing van komplekse ruimtelike interpolasie in rignetantennes.” 2014. Web. 04 Mar 2021.
Vancouver:
Van Wyk MA. Toepassing van komplekse ruimtelike interpolasie in rignetantennes. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10210/10902.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Van Wyk MA. Toepassing van komplekse ruimtelike interpolasie in rignetantennes. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/10902
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manitoba
5.
Liu, Yanxia.
Gain and efficiency enhancement of the miniaturized split ring based antennas.
Degree: Electrical and Computer Engineering, 2016, University of Manitoba
URL: http://hdl.handle.net/1993/32756
► Small antennas are very attractive due to their compactness and lightness. However, the price one has to pay for having a small antenna, such as…
(more)
▼ Small antennas are very attractive due to their compactness and lightness. However, the price one has to pay for having a small
antenna, such as significant reduction in radiation efficiency, gain and bandwidth, makes them less practical and less useful. This thesis demonstrates how one can miniaturize an
antenna by artificially inducing high-permeability in the
antenna such that less efficiency and gain will be sacrificed. The improvement in efficiency is achieved by reducing the losses in the
antenna; and the improvement in gain is achieved by increasing both efficiency and directivity, which are realized by reducing the losses in the
antenna and replacing a conventional ground plane with a U-shaped ground plane, respectively. The high-permeability is induced by employing metallic loops (e.g. split ring resonators (SRRs)) and properly arranging them with respect to the magnetic field. First, split ring loaded dielectric resonator antennas are studied. It is shown that loading a conventional dielectric resonator
antenna (DRA) with SRRs can indeed miniaturize the
antenna. The miniaturization capability varies with SRR parameters and arrangements: the larger the SRR area, the higher the miniaturization capability. The arrangement of a single SRR allows for the most miniaturization, compared to other arrangements, but the others can provide wider bandwidths. One of the examples shows that loading a very low-permittivity (ε_r=2.2) based DRA with three layers of single SRR is equivalent to increasing the permittivity of the dielectric to ε_r=976. The miniaturized
antenna also has a reasonably good efficiency (80.85%) and gain (6.69 dBi), despite its small dimensions (0.124λ_0×0.062λ_0×0.002λ_0). In order to further miniaturize the SRR loaded DRAs, two types of metallization, namely U-shaped and split-ring-shaped metallizations, are applied to the surfaces of the loaded DRAs. It is found that both metallizations have little effect on a single-element loaded DRA, but can effectively miniaturize the unloaded DRA, since similar to SRRs, both metallizations are also capable of inducing permeability. Therefore, a probe-fed flat-wire open ring
antenna, essentially just the split-ring-shaped metallization, is also studied. Good
antenna performance (efficiency of 86.36% and gain of 7.94 dBi) is also observed with such a miniaturized
antenna (dimensions: 0.113λ_0×0.057λ_0×0.011λ_0). In order to further miniaturize the open ring
antenna, a two-turn flat-wire open ring with different slit combinations is investigated. By placing the slit of the outer ring at the bottom and the slit of the inner ring at the top, the
antenna can be most effectively miniaturized.
Advisors/Committee Members: Shafai, Lotfollah (Electrical and Computer Engineering) (supervisor), Isleifson, Dustin (Electrical and Computer Engineering).
Subjects/Keywords: Antenna miniaturization
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, Y. (2016). Gain and efficiency enhancement of the miniaturized split ring based antennas. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/32756
Chicago Manual of Style (16th Edition):
Liu, Yanxia. “Gain and efficiency enhancement of the miniaturized split ring based antennas.” 2016. Masters Thesis, University of Manitoba. Accessed March 04, 2021.
http://hdl.handle.net/1993/32756.
MLA Handbook (7th Edition):
Liu, Yanxia. “Gain and efficiency enhancement of the miniaturized split ring based antennas.” 2016. Web. 04 Mar 2021.
Vancouver:
Liu Y. Gain and efficiency enhancement of the miniaturized split ring based antennas. [Internet] [Masters thesis]. University of Manitoba; 2016. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1993/32756.
Council of Science Editors:
Liu Y. Gain and efficiency enhancement of the miniaturized split ring based antennas. [Masters Thesis]. University of Manitoba; 2016. Available from: http://hdl.handle.net/1993/32756
6.
Islam, Jahurul.
Antenna Design for Portable Applications in LTE Band.
Degree: Mathematics and Natural Sciences, 2011, University of Gävle
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-10961
► The planar dual band monopole antenna is presented in this project report for Long Term Evolution (LTE). The proposed planar monopole antenna is selected…
(more)
▼ The planar dual band monopole antenna is presented in this project report for Long Term Evolution (LTE). The proposed planar monopole antenna is selected because of its simple structure, cost effective components and excellent performance. The antenna operates in 3.4 GHz to 3.6 GHz and 3.6 GHz to 3.8 GHz in desired LTE frequency band. The frequency bands 3.4- 3.6 GHz and 3.6- 3.8 GHz are already available as a study of current plan according to UMTS and LTE systems.
The designed antenna works parallel with the LTE radio access; packet core networks are also involved. A very well developed and good designed antenna relaxes the other system components and improves the performances of the whole system. For the portable application and for the multiband scenario, planar monopole is the best candidate for the proposed two bands. LTE (3.4 GHz-3.6 GHz) and LTE-Advanced (3.6 GHz-3.8 GHz) antennas are designed for portable wireless devices.
Radiation pattern and operating frequency are varied according to feeding of antenna. Return loss, radiation pattern, antenna efficiency, bandwidth and gain are important parameters of the designed antenna and are measured after simulation through CST Microwave Studio. The designed antenna is then fabricated in KTH antenna Lab.
Subjects/Keywords: Antenna; LTE
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Islam, J. (2011). Antenna Design for Portable Applications in LTE Band. (Thesis). University of Gävle. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-10961
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Islam, Jahurul. “Antenna Design for Portable Applications in LTE Band.” 2011. Thesis, University of Gävle. Accessed March 04, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-10961.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Islam, Jahurul. “Antenna Design for Portable Applications in LTE Band.” 2011. Web. 04 Mar 2021.
Vancouver:
Islam J. Antenna Design for Portable Applications in LTE Band. [Internet] [Thesis]. University of Gävle; 2011. [cited 2021 Mar 04].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-10961.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Islam J. Antenna Design for Portable Applications in LTE Band. [Thesis]. University of Gävle; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-10961
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech
7.
Chan, Cheong Yu.
Experimental investigation of fast plasma production for the VAIPER antenna.
Degree: MS, Aerospace Engineering, 2017, Georgia Tech
URL: http://hdl.handle.net/1853/59307
► For this Master’s thesis, I will conduct the preliminary experimental study of fast plasma ignition times under varying conditions. The timing of the plasma needs…
(more)
▼ For this Master’s thesis, I will conduct the preliminary experimental study of fast plasma ignition times under varying conditions. The timing of the plasma needs to be characterized before a small scale plasma
antenna can be completed. The experimental part of this project is a collaboration between Prof. Mitchell Walker’s High Power Electric Propulsion Lab (HPEPL) in Aerospace Engineering and Prof. Morris Cohen’s group in Electrical and Computer Engineering at the Georgia Institute of Technology.
Advisors/Committee Members: Walker, Mitchell (advisor), Cohen, Morris (committee member), Sun, Wenting (committee member).
Subjects/Keywords: Plasma; Antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chan, C. Y. (2017). Experimental investigation of fast plasma production for the VAIPER antenna. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59307
Chicago Manual of Style (16th Edition):
Chan, Cheong Yu. “Experimental investigation of fast plasma production for the VAIPER antenna.” 2017. Masters Thesis, Georgia Tech. Accessed March 04, 2021.
http://hdl.handle.net/1853/59307.
MLA Handbook (7th Edition):
Chan, Cheong Yu. “Experimental investigation of fast plasma production for the VAIPER antenna.” 2017. Web. 04 Mar 2021.
Vancouver:
Chan CY. Experimental investigation of fast plasma production for the VAIPER antenna. [Internet] [Masters thesis]. Georgia Tech; 2017. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1853/59307.
Council of Science Editors:
Chan CY. Experimental investigation of fast plasma production for the VAIPER antenna. [Masters Thesis]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/59307

King Abdullah University of Science and Technology
8.
Su, Zhen.
3D Near Isotropic Antenna in Package for IoT Applications.
Degree: Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, 2020, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/665969
► Internet of Things (IoT) is an emerging paradigm about building a massive internet to link billions of non-living things to make smart decisions for humans…
(more)
▼ Internet of Things (IoT) is an emerging paradigm about building a massive internet to link billions of non-living things to make smart decisions for humans and improve their quality of life. For many of IoT devices, such as wireless sensor nodes dispersed in the environment, there is not much control over their placements or orientations. Thus, there is a need to develop orientation insensitive antennas that ensure reliable data transmission irrespective of devices’ positions or orientations.
As billions of such IoT devices required in the future, a low-cost fabrication process suitable for mass manufacturing must be adapted.
Antenna in package (AiP) concept is beneficial that the package is utilized to realize the antennas, not only saving space but also reducing the overall cost. For orientation insensitivity, antennas must be near isotropic and even have to maintain their radiation pattern for multi-bands or wide bandwidths in most applications. However, there is a dearth in the literature about design methodologies for near isotropic antennas, particularly for multi-bands near isotropic AiP designs. In addition, a near isotropic behavior is also important for polarization, particularly for CP antennas. To have simultaneous isotropy in radiation pattern and circular polarization is challenging.
In the nut shell, this thesis presents theoretical models and derives conditions for wire
AiP design for different specifications, single-band and dual-band near isotropic antennas, null free near isotropic
antenna with wide CP coverage, and a full CP
antenna with decent near isotropy (with very narrow null beam). The single-band AiP has only 5.05 dB gain variation at WiFi/BLE band and the dual-band AiP has a decent near isotropic radiation property and covers both GSM900 and GSM1800 bands. The theoretical model for null-free near isotropic
antenna with wide CP coverage is presented with particle swarm optimization (PSO). The full CP
antenna has a measured CP coverage of 70% with a small null in the radiation pattern. The results are promising and indicate that the conditions and methods proposed are useful for the future near isotropic AiP design. Also, this work provides designers flexibility to adjust the AiP design according to their own applications.
Advisors/Committee Members: Shamim, Atif (advisor), Shamim, Atif (committee member), Bagci, Hakan (committee member), Wu, Ying (committee member), Wu, Ke (committee member).
Subjects/Keywords: Antenna Theory; Near Isotropic Antenna; Antenna in Package; Antenna Synthesis
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Su, Z. (2020). 3D Near Isotropic Antenna in Package for IoT Applications. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/665969
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Su, Zhen. “3D Near Isotropic Antenna in Package for IoT Applications.” 2020. Thesis, King Abdullah University of Science and Technology. Accessed March 04, 2021.
http://hdl.handle.net/10754/665969.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Su, Zhen. “3D Near Isotropic Antenna in Package for IoT Applications.” 2020. Web. 04 Mar 2021.
Vancouver:
Su Z. 3D Near Isotropic Antenna in Package for IoT Applications. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2020. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10754/665969.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Su Z. 3D Near Isotropic Antenna in Package for IoT Applications. [Thesis]. King Abdullah University of Science and Technology; 2020. Available from: http://hdl.handle.net/10754/665969
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Minnesota
9.
Bereka, Desalegn.
60GHz Integrated On-chip Antenna on Silicon for High Speed Applications.
Degree: PhD, Electrical Engineering, 2015, University of Minnesota
URL: http://hdl.handle.net/11299/175228
► Abstract The recent release of the unlicensed 60 GHz band tackles the increasing demand for more bandwidth in the wireless consumer electronics market. In order…
(more)
▼ Abstract The recent release of the unlicensed 60 GHz band tackles the increasing demand for more bandwidth in the wireless consumer electronics market. In order to meet the cost require-ments of this market, many research groups have worked towards 60 GHz front-end elec-tronics in mainstream silicon technologies, i.e., CMOS and BiCMOS. However, the tech-nology choice for suitable antennas has not been as unitary and is controversially discussed. While there is a wide consensus that the antenna should be integrated in the same package with the front-end integrated circuit (IC), there are three main approaches on the realiza-tion. First, there is the Antenna-in- Package approach, in which the antenna is implemented in the IC's packaging technology. Second, there is the Antenna-on-Chip approach, in which the antenna is directly implemented in the back-end of the IC. Finally, the third approach can be considered as a hybrid of Antenna-on-Chip and Antenna-in-Package, in which the feed-point of the antenna is implemented on-chip while the radiating element itself is real-ized off-chip. This thesis focuses Antenna-on chip main integration strategies. Its goal is to explore the challenges and potentials of this technology with respect to millimeter-wave antenna inte-gration. For this, integrated antenna concepts for the 60 GHz band are developed using mainstream technologies. This restriction is necessary in order to achieve cost-effective solutions for the highly price-competitive wireless consumer electronics market. The main challenge of antenna design in a planar technology is the trade-off between radiation effi-ciency and bandwidth. To obtain a large bandwidth, a relatively thick dielectric layer is needed. However, a thicker dielectric layer introduces more losses due to surface-wave excitation in the dielectric. Silicon with low resistivity substrates also introduce special challenges for high efficiency millimeter wave on-chip antennas. First, their low resistivity of 0.1-20 [omega]-cm results in high dielectric loss and significantly reduces the antenna effi-ciency. Second, TE and TM surface waves are easily triggered in 200-500 [mu]m thick silicon substrates and can have serious detrimental effects on the antenna pattern and efficiency. A lot of work has been done to improve the radiation efficiency of planar antennas while maintaining a large bandwidth. Particularly, the use of electromagnetic band gap (EBG) materials that suppress the surface-wave excitation has received a lot of attention. How-ever, EBG materials are either difficult to manufacture, or too large to be used in planar array configurations. Another approach to improve the radiation efficiency is presented in literatures, where a superstrate antenna is used. This solution shows good perfor-mance. But careful consideration reveals that most designs are not readily amenable to mass production and many purposed structures are very inefficient. Some designs which are efficient require extra process steps such as trenching. This extra process hinders to…
Subjects/Keywords: 60GHz antenna; Integrated antenna; low profile antenna; On chip antenna; planar antenna
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bereka, D. (2015). 60GHz Integrated On-chip Antenna on Silicon for High Speed Applications. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/175228
Chicago Manual of Style (16th Edition):
Bereka, Desalegn. “60GHz Integrated On-chip Antenna on Silicon for High Speed Applications.” 2015. Doctoral Dissertation, University of Minnesota. Accessed March 04, 2021.
http://hdl.handle.net/11299/175228.
MLA Handbook (7th Edition):
Bereka, Desalegn. “60GHz Integrated On-chip Antenna on Silicon for High Speed Applications.” 2015. Web. 04 Mar 2021.
Vancouver:
Bereka D. 60GHz Integrated On-chip Antenna on Silicon for High Speed Applications. [Internet] [Doctoral dissertation]. University of Minnesota; 2015. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/11299/175228.
Council of Science Editors:
Bereka D. 60GHz Integrated On-chip Antenna on Silicon for High Speed Applications. [Doctoral Dissertation]. University of Minnesota; 2015. Available from: http://hdl.handle.net/11299/175228

University of Colorado
10.
Radway, Matthew John.
Mode Theory of Multi-Armed Spiral Antennas and Its Application to Electronic Warfare Antennas.
Degree: PhD, Electrical, Computer & Energy Engineering, 2011, University of Colorado
URL: https://scholar.colorado.edu/ecen_gradetds/28
► Since their invention about 55 years ago, spiral antennas have earned a reputation for providing stable impedance and far-field patterns over multi-decade frequency ranges.…
(more)
▼ Since their invention about 55 years ago, spiral antennas have earned a reputation for providing stable impedance and far-field patterns over multi-decade frequency ranges. For the first few decades these antennas were researched for electronic warfare receiving applications, primarily in the 2-18 GHz range. This research was often done under conditions of secrecy, and often by private contractors who did not readily share their research, and now have been defunct for decades. Even so, the body of literature on the two-armed variant of these antennas is rich, often leading non-specialists to the misconception that these antennas are completely understood. Furthermore, early work was highly experimental in nature, and was conducted before modern data collection and postprocessing capabilities were widespread, which limited the range of the studies. Recent research efforts have focused on extending the application of spirals into new areas, as well as applying exotic materials to `improve' their performance and reduce their size. While interesting results have been obtained, in most instances these were incomplete, often compromising the frequency independent nature of these antennas. This thesis expands the role of the multi-armed spiral outside of its traditional niche of receive-only monopulse direction finding. As a first step, careful study of the spiral-
antenna mode theory is undertaken with particular attention paid to the concepts of mode filtering and modal decomposition. A technique for reducing the modal impedance of high arm-count spirals is introduced. The insights gained through this theoretical study are first used to improve the far-field performance of the coiled-arm spiral
antenna. Specifically, expanding the number of arms on a coiled arm spiral from two to four while providing proper excitation enables dramatically improved broadside axial ratio and azimuthal pattern uniformity. The multiarming technique is then applied to the design of an
antenna with exceptionally stable and clean radiation patterns without use of an absorbing cavity. The multiarming technique allows the spiral to retain its pattern integrity at frequencies well below those of comparable two-armed spiral antennas. A quadrifilar helix-type of end-loading is applied to the end of the spiral, resulting in dramatically-improved low-frequency gain. Careful application of resistive end-loading allows good impedance matching at frequencies as low as one-half of the Mode 1 cutoff frequency, while providing acceptable radiation efficiency due to effective use of the available
antenna volume. A novel dual-layering technique for reducing the spiral's modal impedance is presented, allowing the
antenna to present a good impedance match to a 50 ohm system. The third application of mode theory has been to exploit the wideband multi-mode capability of the multi-armed spiral
antenna to implement a simple wide-band radiation pattern nulling technique on a multi-armed spiral
antenna. It is shown that wideband nulling is possible and that, in…
Advisors/Committee Members: Dejan S. Filipovic, Michael C. Buck, Edward F. Kuester.
Subjects/Keywords: antenna; antenna radiation pattern; circularly polarized antenna; frequency independent antenna; multi-armed spiral antenna; spiral antenna; Electromagnetics and Photonics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Radway, M. J. (2011). Mode Theory of Multi-Armed Spiral Antennas and Its Application to Electronic Warfare Antennas. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/ecen_gradetds/28
Chicago Manual of Style (16th Edition):
Radway, Matthew John. “Mode Theory of Multi-Armed Spiral Antennas and Its Application to Electronic Warfare Antennas.” 2011. Doctoral Dissertation, University of Colorado. Accessed March 04, 2021.
https://scholar.colorado.edu/ecen_gradetds/28.
MLA Handbook (7th Edition):
Radway, Matthew John. “Mode Theory of Multi-Armed Spiral Antennas and Its Application to Electronic Warfare Antennas.” 2011. Web. 04 Mar 2021.
Vancouver:
Radway MJ. Mode Theory of Multi-Armed Spiral Antennas and Its Application to Electronic Warfare Antennas. [Internet] [Doctoral dissertation]. University of Colorado; 2011. [cited 2021 Mar 04].
Available from: https://scholar.colorado.edu/ecen_gradetds/28.
Council of Science Editors:
Radway MJ. Mode Theory of Multi-Armed Spiral Antennas and Its Application to Electronic Warfare Antennas. [Doctoral Dissertation]. University of Colorado; 2011. Available from: https://scholar.colorado.edu/ecen_gradetds/28
11.
Saif, Khalid.
Mobile Phone Antenna Design.
Degree: 2015, , Department of Applied Signal Processing
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1080
► This thesis focuses on mobile phones antenna design with brief description about the historical development, basic parameters and the types of antennas which are…
(more)
▼ This thesis focuses on mobile phones antenna design with brief description about the historical development, basic parameters and the types of antennas which are used in mobile phones. Mobile phones antenna design section consists of two proposed PIFA antennas. The first design concerns a single band antenna with resonant frequency at GPS frequency (1.575GHz). The first model is designed with main consideration that is to have the lower possible PIFA single band dimensions with reasonable return loss (S11) and the<em> efficiencies. Second design concerns in a wideband PIFA antenna which cover the range from 1800MHz to 2600MHz. This range covers certain important bands: GSM (1800MHz & 1900MHz), UMTS (2100MHz), Bluetooth & Wi-Fi (2.4GHz) and LTE system (2.3GHz, 2.5GHz, and 2.6GHz). The wideband PIFA design is achieved by using slotted ground plane technique. The simulations for both models are performed in COMSOL</em> Multiphysics. The last two parts of the thesis present the problems of mobile phones antenna. Starting with Specific absorption rate (SAR) problem, efficiency of Mobile phones antenna, and hand-held environment.
Subjects/Keywords: mobile phones antenna; mobile; antenna; mobile phone antenna design; SAR; PIFA; PIFA antenna design; GPS antenna design; wideband antenna design
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Saif, K. (2015). Mobile Phone Antenna Design. (Thesis). , Department of Applied Signal Processing. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1080
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Saif, Khalid. “Mobile Phone Antenna Design.” 2015. Thesis, , Department of Applied Signal Processing. Accessed March 04, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1080.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Saif, Khalid. “Mobile Phone Antenna Design.” 2015. Web. 04 Mar 2021.
Vancouver:
Saif K. Mobile Phone Antenna Design. [Internet] [Thesis]. , Department of Applied Signal Processing; 2015. [cited 2021 Mar 04].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1080.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Saif K. Mobile Phone Antenna Design. [Thesis]. , Department of Applied Signal Processing; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1080
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
12.
Fang, Chi-Rung.
Mobile Devices Antenna for LTE MIMO Operations.
Degree: Master, Electrical Engineering, 2014, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0624114-173247
► This thesis mainly discusses the design of LTE multi-band antennas for the applications of the LTE communication systems. The proposed antenna is also suitable for…
(more)
▼ This thesis mainly discusses the design of LTE multi-band antennas for the applications of the LTE communication systems. The proposed
antenna is also suitable for being embedded in smart mobile devices. A monopole
antenna resonates at a frequency of 1.8 GHz was designed as the reference
antenna. Then, two resonant frequencice of 700 and 900 MHz were obtained by coupling two shorting strips to the reference
antenna. Finally, good impedance matching can be obtained by adjusting the strip width. The proposed multi-band
antenna achieved good impedance matching over operating bands of the LTE 700, LTE/GSM 900, LTE/DCS 1800, PCS 1900 and UMTS under S11 ⤠-6 dB criterion. In addition, this
antenna element was further applied to multiple-input multiple-output (MIMO)
antenna communication system. A simple isolator was designed and placed it between two
antenna elements. In this case, the S21 achieves near -15 dB near 1.8 GHz and the generally acceptable standard S21 < -10dB for the LTE applications. The overall
antenna size is of only 50 Ã 20 Ã 0.8 mm3 that can be easily realized on the printed circuit board.
Antenna parameters such as reflection coefficient was measured to validate the proposed antennas. Detail parameters studies and measurement data were performed in the thesis.
Advisors/Committee Members: Pu-Hua Deng (chair), Hsing-Feng Chen (chair), Ken-Huang Lin (committee member), Hsin-Lung Su (chair), Chih-Wen Kuo (chair).
Subjects/Keywords: multiband antenna; LTE; MIMO; isolation enhancement; Antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fang, C. (2014). Mobile Devices Antenna for LTE MIMO Operations. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0624114-173247
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fang, Chi-Rung. “Mobile Devices Antenna for LTE MIMO Operations.” 2014. Thesis, NSYSU. Accessed March 04, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0624114-173247.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fang, Chi-Rung. “Mobile Devices Antenna for LTE MIMO Operations.” 2014. Web. 04 Mar 2021.
Vancouver:
Fang C. Mobile Devices Antenna for LTE MIMO Operations. [Internet] [Thesis]. NSYSU; 2014. [cited 2021 Mar 04].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0624114-173247.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fang C. Mobile Devices Antenna for LTE MIMO Operations. [Thesis]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0624114-173247
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
13.
Adams, Kimberly Lynn.
Comparison of Accuracy of Simulations of Stepped-Diameter Yagi Antennas
.
Degree: 2012, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/16321
► Stepped-diameter Yagi antennas are used in multiple applications and are often designed with computer simulations. These computer simulations can take geometry input and visualize both…
(more)
▼ Stepped-diameter Yagi antennas are used in multiple applications and are often designed with computer simulations. These computer simulations can take geometry input and visualize both the geometry and output to focus on needed desired behaviors. The
antenna simulation software GNEC has shown to be accurate with both constant diameter Yagis and stepped-diameter Yagis. One of the purposes of this thesis is to show if the newer software FEKO can also model constant and stepped-diameter Yagi antennas with the same modeling guideline rules, mainly segment size in wavelengths, as in GNEC.
Complex Yagi antennas did not model in FEKO as well as in GNEC using the same basic rule for segment sizes, so a comparison of several Yagi antennas in two different simulation programs were compared to identify any trends and also compare with measurements when available.
A constant diameter Yagi, a stepped-diameter Yagi, stacked stepped-diameter Yagis and a multiband stepped-diameter
antenna were modeled in GNEC and FEKO. Results were compared between the simulation programs and compared to available measured results. The output from FEKO was shown to be shifted from measured results proportional to frequency, in relation to segment sizes. The antennas in FEKO were found to require segment sizes five times smaller than the minimum required for GNEC. This was true for both constant and stepped-diameter antennas. It is recommended that a FEKO user always use a custom selected segment size less than or equal to λ/100 and not use the default selections.
Advisors/Committee Members: James Kenneth Breakall, Thesis Advisor/Co-Advisor.
Subjects/Keywords: Yagi antenna; GNEC; FEKO; stepped-diameter antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Adams, K. L. (2012). Comparison of Accuracy of Simulations of Stepped-Diameter Yagi Antennas
. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/16321
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Adams, Kimberly Lynn. “Comparison of Accuracy of Simulations of Stepped-Diameter Yagi Antennas
.” 2012. Thesis, Penn State University. Accessed March 04, 2021.
https://submit-etda.libraries.psu.edu/catalog/16321.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Adams, Kimberly Lynn. “Comparison of Accuracy of Simulations of Stepped-Diameter Yagi Antennas
.” 2012. Web. 04 Mar 2021.
Vancouver:
Adams KL. Comparison of Accuracy of Simulations of Stepped-Diameter Yagi Antennas
. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 04].
Available from: https://submit-etda.libraries.psu.edu/catalog/16321.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Adams KL. Comparison of Accuracy of Simulations of Stepped-Diameter Yagi Antennas
. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/16321
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université de Grenoble
14.
Nambiar, Siddhath.
Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices.
Degree: Docteur es, Physique, 2012, Université de Grenoble
URL: http://www.theses.fr/2012GRENY099
► Bien que les propriétés optiques des métaux nanostructurés soit connues depuis de nombreuses décennies, ce n'est que dans les dernières années que ce domaine a…
(more)
▼ Bien que les propriétés optiques des métaux nanostructurés soit connues depuis de nombreuses décennies, ce n'est que dans les dernières années que ce domaine a suscité un grand intérêt. Ceci est en partie dû aux nombreux progrès des techniques de nanofabrication. Le domaine de la plasmonique est souvent présentée comme la support de la prochaine génération de dispositifs de traitement de l'information, mélageant la nanoélectronique et la photonique silicium pour obtenir des disposotifs plus performants. Les systèmes microélectroniques actuels approchant de la saturation en terme de bande passante et de consomation énergétique, la migration vers les systèmes photoniques semble inévitable. La prédiction de la réponse électromagnétique de ces composants nano-photoniques est essentiels au succès de leur intégration réaliste. Les outils numériques de simulation électromagnétiques sont le moyen par excellence de calculer précisement er de manière réaliste les propriétés optiques de composants nanophotoniques, et en particulier ceux utilisant des plasmons de surface. Ce travail de thèse rend compte de l'analyse numérique de la propagation et des caractéristiques de champ proche de composants à base de plasmons pour la photonique en technologie CMOS. Les deux principaux outils de modélisation EM utilisés à cet égard sont la méthode des éléments des moments, ainsi que la FDTD. Deux types principaux de dispositifs actifs plasmoniques actifs ont été étudiés: d'une part les modulateurs électro-optiques intégrés et d'autre part des détecteurs à base de quantum dot de Ge, le tout dans la gamme du proche infrarouge. La question cruciale d'un couplage efficace de la lumière dans un mode très confiné plasmonique a d'abord été étudiée de manière à isoler la part modale des principales contributions. Ensuite, une nouvelle structure de modulateur assisté plasmon a été proposée et une conception optique complète prenant en compte les contraintes technologiques d'une fonderie CMOS est proposée et discutée. Enfin une conception optimisée du couplage radiatif de l'absorption d'un point de Ge, en utilisant une antenne dipolaire plasmonique, est étudiée. En particulier, l'ingénierie radiative du substrat SOI permet de démontrer un effet considérable sur la performance finale du dispositif.
Interest in the field of plasmonics has been primarily driven by the need to guide and confine light in the subwavelength scale. The past few years has witnessed a huge interest in this field largely due to the may advances that have occured in nanofabrication techniques. The field of plasmonics is often touted as the next generation platform that could interface nanoscale electronics and Si photonics. With current electronic systems nearing saturation, the migration to photonic systems would become inevitable. Crucial to achieving this integration is to design reliable plasmonic components within nanophotonics circuits. This however requires an accurate estimation of the electromagnetic response of these components. Numerical modeling tools are one way to…
Advisors/Committee Members: Sanquer, Marc (thesis director).
Subjects/Keywords: Plasmon; Antenna; Silicium; Plasmon; Antenna; Silicon
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nambiar, S. (2012). Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2012GRENY099
Chicago Manual of Style (16th Edition):
Nambiar, Siddhath. “Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices.” 2012. Doctoral Dissertation, Université de Grenoble. Accessed March 04, 2021.
http://www.theses.fr/2012GRENY099.
MLA Handbook (7th Edition):
Nambiar, Siddhath. “Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices.” 2012. Web. 04 Mar 2021.
Vancouver:
Nambiar S. Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices. [Internet] [Doctoral dissertation]. Université de Grenoble; 2012. [cited 2021 Mar 04].
Available from: http://www.theses.fr/2012GRENY099.
Council of Science Editors:
Nambiar S. Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices. [Doctoral Dissertation]. Université de Grenoble; 2012. Available from: http://www.theses.fr/2012GRENY099

Virginia Tech
15.
Barts, Robert Michael.
The Stub Loaded Helix: A Reduced Size Helical Antenna.
Degree: PhD, Electrical and Computer Engineering, 2003, Virginia Tech
URL: http://hdl.handle.net/10919/29728
► This dissertation details the development of a novel reduced size axial mode helical antenna called the Stub Loaded Helix (SLH). The SLH achieves a significant…
(more)
▼ This dissertation details the development of a novel reduced size axial mode helical
antenna called the Stub Loaded Helix (SLH). The SLH achieves a significant reduction in helix size, both diameter and length, compared to the conventional axial mode helix
antenna with only small compromises in performance. The SLH achieves this entirely through the use of a unique geometry. The performance characteristics of the SLH are explored through the use of computer simulations using NEC (Numerical Electromagnetics Code) to study the effects of design parameter variations. Based on those simulations, design guides are developed. The numerical simulations are verified though measurements of experimental prototypes. The program of experimental prototypes included the development of an appropriate impedance matching network for the SLH, which is also detailed.
Advisors/Committee Members: Stutzman, Warren L. (committeechair), Safaai-Jazi, Ahmad (committee member), Brown, Gary S. (committee member), Carver, Keith R. (committee member), Davis, William A. (committee member).
Subjects/Keywords: antenna; helical antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Barts, R. M. (2003). The Stub Loaded Helix: A Reduced Size Helical Antenna. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/29728
Chicago Manual of Style (16th Edition):
Barts, Robert Michael. “The Stub Loaded Helix: A Reduced Size Helical Antenna.” 2003. Doctoral Dissertation, Virginia Tech. Accessed March 04, 2021.
http://hdl.handle.net/10919/29728.
MLA Handbook (7th Edition):
Barts, Robert Michael. “The Stub Loaded Helix: A Reduced Size Helical Antenna.” 2003. Web. 04 Mar 2021.
Vancouver:
Barts RM. The Stub Loaded Helix: A Reduced Size Helical Antenna. [Internet] [Doctoral dissertation]. Virginia Tech; 2003. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10919/29728.
Council of Science Editors:
Barts RM. The Stub Loaded Helix: A Reduced Size Helical Antenna. [Doctoral Dissertation]. Virginia Tech; 2003. Available from: http://hdl.handle.net/10919/29728

Delft University of Technology
16.
Pelekanidis, Antonios (author).
A THz Lens Antenna fed by a Photoconductive Connected Dipole Array.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:05998137-5d7d-4234-b8f7-d6c0ef517569
► Photoconductive antennas have been used extensively for THz radiation the last few years. In this thesis, we propose a photoconductive connected dipole array consisting of…
(more)
▼ Photoconductive antennas have been used extensively for THz radiation the last few years. In this thesis, we propose a photoconductive connected dipole array consisting of 36x36 elements that is used as a feed in a THz silicon lens and radiates in a band ranging from 100 GHz to 5 THz. Specifically, we compute theoretically the radiated field patterns of the array as well as the secondary field beyond the lens. Furthermore, we investigate the feasibility of the fabrication of such a photoconductive connected array, given the challenges in 3D printing of a um-sized microlens array that is used to focus the laser power to the excitation gaps of the dipoles. We conclude that microlenses of sufficient accuracy can be fabricated in the premises of TU Delft without compromising the efficiency expected in theory. Lastly, we build a Matlab GUI that computes the far field radiated by various types and sizes of lens antennas in transmission, provided that the field radiated by the feed is already known. This tool has been successfully validated and supported the work in the first part of the thesis at the calculation of the far field of our proposed THz silicon lens
antenna.
Advisors/Committee Members: Neto, A. (mentor), Llombart Juan, N. (graduation committee), Mastrangeli, M. (graduation committee), Sberna, P.M. (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: THz antenna; Photoconductive antenna; Microlens array
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MLA ·
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APA (6th Edition):
Pelekanidis, A. (. (2020). A THz Lens Antenna fed by a Photoconductive Connected Dipole Array. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:05998137-5d7d-4234-b8f7-d6c0ef517569
Chicago Manual of Style (16th Edition):
Pelekanidis, Antonios (author). “A THz Lens Antenna fed by a Photoconductive Connected Dipole Array.” 2020. Masters Thesis, Delft University of Technology. Accessed March 04, 2021.
http://resolver.tudelft.nl/uuid:05998137-5d7d-4234-b8f7-d6c0ef517569.
MLA Handbook (7th Edition):
Pelekanidis, Antonios (author). “A THz Lens Antenna fed by a Photoconductive Connected Dipole Array.” 2020. Web. 04 Mar 2021.
Vancouver:
Pelekanidis A(. A THz Lens Antenna fed by a Photoconductive Connected Dipole Array. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Mar 04].
Available from: http://resolver.tudelft.nl/uuid:05998137-5d7d-4234-b8f7-d6c0ef517569.
Council of Science Editors:
Pelekanidis A(. A THz Lens Antenna fed by a Photoconductive Connected Dipole Array. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:05998137-5d7d-4234-b8f7-d6c0ef517569

University of Akron
17.
Nelakonda, Nikitha.
Design of Robust Superdirective Receiving Antenna Array for
Circular, Hexagonal and Elliptical Geometries.
Degree: MSin Engineering, Electrical Engineering, 2016, University of Akron
URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460984746
► Superdirective beamforming deals with designing an antenna array that gives high gain, narrow radiation pattern and also cancels the signal in unwanted directions. It is…
(more)
▼ Superdirective beamforming deals with designing an
antenna array that gives high gain, narrow radiation pattern and
also cancels the signal in unwanted directions. It is not
practically possible to achieve the same properties as an array
antenna without use of an array; to do so would require a huge
antenna that is too complex and expensive to be practical.Use of an
array
antenna induces a white noise gain into the output of an
antenna array due to the mismatches between the
antenna elements in
an array. In optimum array gain method array gain optimization is
considered as eigenvalue problem and
antenna weights are the
eigenvector of the largest eigenvalue. Optimum array gain method
gives the maximum value of array gain and white noise gain which is
not possible in practice, due to induced white noise gain. In this
thesis, we present a design for a superdirective receiving circular
antenna array. In the design process, complex (amplitude and phase)
weights for each
antenna element in the array are calculated in
order to reduce white noise gain using a constraint for white noise
gain depending on white noise gain from optimum array gain method.
The output beam pattern of an array
antenna is a function of the
weights and
antenna element positions. Beam patterns of each
individual
antenna element are multiplied by their respective
complex weights and then summed together to give the output
radiation pattern.
Antenna arrays using the weights found with this
design process have lower white noise gain than antennas designed
using optimum array gain method.The circular
antenna array has a
drawback in that it has high side lobe levels in the radiation
pattern. In order to design antennas with a more narrow radiation
pattern, the design method is further extended to different
antenna
array geometries namely elliptical, concentric elliptical,
cylindrical elliptical, hexagonal and concentric hexagonal array
geometries. The array gain and white noise gain are calculated and
the radiation patterns of these geometries are plotted using
MATLAB. All these simulation results are compared with the optimum
array gain method which does not consider white noise gain for
calculation of
antenna weights. Use of other geometries in place of
circular array geometry has advantages like reduced side lobe level
and increase of array gain considering same number of
antenna
elements in elliptical array compared to circular array. Then,
simulation results for optimum array gain and constrained optimum
array gain are generated at 60 GHz and 30 GHz frequency waves which
are millimeter waves and results are compared and discussed with 30
MHz wave results. These results show that use of millimeter wave
frequency reduces the size of the array
antenna.
Advisors/Committee Members: S. I., Hariharan (Advisor).
Subjects/Keywords: Electrical Engineering; Antenna Arrays, Superdirective Antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nelakonda, N. (2016). Design of Robust Superdirective Receiving Antenna Array for
Circular, Hexagonal and Elliptical Geometries. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1460984746
Chicago Manual of Style (16th Edition):
Nelakonda, Nikitha. “Design of Robust Superdirective Receiving Antenna Array for
Circular, Hexagonal and Elliptical Geometries.” 2016. Masters Thesis, University of Akron. Accessed March 04, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=akron1460984746.
MLA Handbook (7th Edition):
Nelakonda, Nikitha. “Design of Robust Superdirective Receiving Antenna Array for
Circular, Hexagonal and Elliptical Geometries.” 2016. Web. 04 Mar 2021.
Vancouver:
Nelakonda N. Design of Robust Superdirective Receiving Antenna Array for
Circular, Hexagonal and Elliptical Geometries. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2021 Mar 04].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460984746.
Council of Science Editors:
Nelakonda N. Design of Robust Superdirective Receiving Antenna Array for
Circular, Hexagonal and Elliptical Geometries. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460984746

University of Alberta
18.
Moghadas, Hamid.
Analysis and Design of MEMS-Based Multi-Functional Aperture
Antennas.
Degree: PhD, Department of Electrical and Computer
Engineering, 2014, University of Alberta
URL: https://era.library.ualberta.ca/files/c2j62s5037
► Future antennas consist of low-profile smart multi-functional radiating apertures which support multi-beams of multi-bands with multi-polarizations. They can scan the surrounding environment, choose the band…
(more)
▼ Future antennas consist of low-profile smart
multi-functional radiating apertures which support multi-beams of
multi-bands with multi-polarizations. They can scan the surrounding
environment, choose the band of interest and generate the required
beam shape. Such antenna can be utilized in numerous emerging
applications such as vehicular satellite communication, software
defined and cognitive radio, and also next generation of mobile
networks (5G). This thesis develops MEMS-tunable
orthogonally-polarized dual-band Resonant Cavity Antennas (RCA) and
also reflectarrays as platforms for future multi-functional
aperture antennas. As an initial prototype, a high gain
orthogonally polarized dual broadside beam RCA is designed,
fabricated and measured. Also, an equivalent transmission line
model and a design flow chart are extracted for the RCA in order to
understand the dual band beam forming and facilitate the quick
design. Furthermore, the independence and the arbitrary separation
of the operating bands is demonstrated. Next, a MEMS-tunable RCA is
designed, fabricated and measured with an upper band vertically
polarized broadside beam and a lower band horizontally polarized
beam which is switched among all possible beam shapes of leaky wave
antennas, i.e., broadside, symmetric conical, and also an
asymmetric single beam which is either frequency scanned or steered
at fixed frequency. Traditionally, a Full Phase-Gradient (FPG)
Partially Reflective Surface (PRS) has been used in an RCA for
generating beams off broadside. A FPG-PRS is a non-uniform aperture
where a continuous phase gradient is applied between adjacent cells
in the whole PRS. Here, the novel configuration of Half
Phase-Gradient (HPG) PRS was offered where the phase gradient is
applied between adjacent cells in half of PRS in order to utilize
the inherent leaky wave phase progress inside the cavity. The
HPG-PRS provides enhanced scan profile, faster real time tracking,
and reduced DC power consumption which are all critical in
wireless, space and military applications. Furthermore, a novel
model is extracted for calculating the radiation of such RCAs with
non-uniform aperture and verified by comparison with measurements.
This model can be applied to any leaky wave antenna with arbitrary
unit cell shape and periodicity. Finally, the unit cell required
for the beam shaping RCA is realized by hybrid integrated MEMS
switches. In the field of reflectarrays however, a phase tunable
low loss double slotted patch reflective unit cell is designed and
simulated for operation at 12 GHz with vertical polarization and 14
GHz with horizontal polarization for Ku band mobile satellite
communication. The phase tuning is facilitated using an array of
switches across both slots in order to dynamically control the
equivalent slot length. A monolithic custom fabrication process is
developed for fabrication of the proposed reflectarray unit cell
with MEMS switches. Finally, this unit cells is measured inside a
waveguide setup with DC bias pads to verify the phase
tuning.
Subjects/Keywords: reflectarray; antenna; mems
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moghadas, H. (2014). Analysis and Design of MEMS-Based Multi-Functional Aperture
Antennas. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/c2j62s5037
Chicago Manual of Style (16th Edition):
Moghadas, Hamid. “Analysis and Design of MEMS-Based Multi-Functional Aperture
Antennas.” 2014. Doctoral Dissertation, University of Alberta. Accessed March 04, 2021.
https://era.library.ualberta.ca/files/c2j62s5037.
MLA Handbook (7th Edition):
Moghadas, Hamid. “Analysis and Design of MEMS-Based Multi-Functional Aperture
Antennas.” 2014. Web. 04 Mar 2021.
Vancouver:
Moghadas H. Analysis and Design of MEMS-Based Multi-Functional Aperture
Antennas. [Internet] [Doctoral dissertation]. University of Alberta; 2014. [cited 2021 Mar 04].
Available from: https://era.library.ualberta.ca/files/c2j62s5037.
Council of Science Editors:
Moghadas H. Analysis and Design of MEMS-Based Multi-Functional Aperture
Antennas. [Doctoral Dissertation]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/c2j62s5037

Penn State University
19.
Greenert, Kristoffer Lee.
Development of a Dielectric Buffered Antenna for Close Range Communications in Lossy Media.
Degree: 2015, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/26457
► Communications in a lossy medium such as sea water has long been dominated by acoustic and optical methods. Ultra high frequency, UHF, communications has been…
(more)
▼ Communications in a lossy medium such as sea water has long been dominated by acoustic and optical methods. Ultra high frequency, UHF, communications has been often sought after, however overlooked due to the attenuation of the medium and difficulty to launch a propagating electromagnetic wave from an
antenna. This thesis describes the development of an
antenna that is capable of communicating over short distances in sea water by implanting a small dipole
antenna into a high permittivity dielectric. Traditional methods have often tried an
antenna encased in an air filled enclosure which has a large impedance mismatch and therefore creates a large reflection at the air-water interface. An
antenna that is encompassed within low loss dielectric that has an impedance similar to sea water will significantly reduce the reflection at the interface. Additionally. as a byproduct of the surrounding high permittivity dielectric, the
antenna size has been significantly reduced. Modeling and simulation as well as laboratory test results show the feasibility of communications over a short distance.
Advisors/Committee Members: Ram Mohan Narayanan, Thesis Advisor/Co-Advisor.
Subjects/Keywords: antenna; lossy media
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Greenert, K. L. (2015). Development of a Dielectric Buffered Antenna for Close Range Communications in Lossy Media. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/26457
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Greenert, Kristoffer Lee. “Development of a Dielectric Buffered Antenna for Close Range Communications in Lossy Media.” 2015. Thesis, Penn State University. Accessed March 04, 2021.
https://submit-etda.libraries.psu.edu/catalog/26457.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Greenert, Kristoffer Lee. “Development of a Dielectric Buffered Antenna for Close Range Communications in Lossy Media.” 2015. Web. 04 Mar 2021.
Vancouver:
Greenert KL. Development of a Dielectric Buffered Antenna for Close Range Communications in Lossy Media. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Mar 04].
Available from: https://submit-etda.libraries.psu.edu/catalog/26457.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Greenert KL. Development of a Dielectric Buffered Antenna for Close Range Communications in Lossy Media. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/26457
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto
20.
Chen, Michael S.
Manipulating Antenna Radiation with Angle Holography.
Degree: 2015, University of Toronto
URL: http://hdl.handle.net/1807/69610
► Holography discovered by Dennis Gabor in 1948 is traditionally used in optics to produce 3D holographic photos. Antenna engineers inspired by this idea have since…
(more)
▼ Holography discovered by Dennis Gabor in 1948 is traditionally used in optics to produce 3D holographic photos. Antenna engineers inspired by this idea have since brought forth holographic antennas to microwave frequencies. However these antenna systems are typically difficult to design and fabricate. In this work a new holographic antenna design is investigated. By analysing interference patterns we devised a method of using tilted radiating elements to represent holographic patterns. In contrast to traditional holographic antennas, our approach dubbed angle holography uses the radiators as both the holographic sampling and excitation source. By using rotations, the antennas are easy to design and fabricate. Arrays using single dipole, cross dipoles, single slot coupled patch, and cross slots coupled patch antennas were implemented. Simulations of conical beam, single beam steering, and beam focusing are demonstrated with single and dual polarization control. Lastly a fabricated prototype is tested confirming the simulated results.
M.A.S.
Advisors/Committee Members: Eleftheriades, George V, Electrical and Computer Engineering.
Subjects/Keywords: Antenna; Holography; 0544
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, M. S. (2015). Manipulating Antenna Radiation with Angle Holography. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/69610
Chicago Manual of Style (16th Edition):
Chen, Michael S. “Manipulating Antenna Radiation with Angle Holography.” 2015. Masters Thesis, University of Toronto. Accessed March 04, 2021.
http://hdl.handle.net/1807/69610.
MLA Handbook (7th Edition):
Chen, Michael S. “Manipulating Antenna Radiation with Angle Holography.” 2015. Web. 04 Mar 2021.
Vancouver:
Chen MS. Manipulating Antenna Radiation with Angle Holography. [Internet] [Masters thesis]. University of Toronto; 2015. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1807/69610.
Council of Science Editors:
Chen MS. Manipulating Antenna Radiation with Angle Holography. [Masters Thesis]. University of Toronto; 2015. Available from: http://hdl.handle.net/1807/69610

University of Ottawa
21.
Desjardins, Jason.
Reconfigurable Dielectric Resonator Antennas
.
Degree: 2011, University of Ottawa
URL: http://hdl.handle.net/10393/19838
► With the increasing demand for high performance communication networks and the proliferation of mobile devices, significant advances in antenna design are essential. In recent years…
(more)
▼ With the increasing demand for high performance communication networks and the proliferation of mobile devices, significant advances in antenna design are essential. In recent years the rising demands of the mobile wireless communication industry have forced antennas to have increased performance while being limited to an ever decreasing footprint. Such design constraints have forced antenna designers to consider frequency agile antennas so that their behavior can adapt with changing system requirements or environmental conditions. Frequency agile antennas used for mobile handset applications must also be inexpensive, robust, and make use of electronic switching with reasonable DC power consumption.
Previous works have addressed a number of these requirements but relatively little work has been performed on frequency agile dielectric resonator antennas (DRAs). The objective of this thesis is to investigate the use of DRAs for frequency reconfigurability. DRAs are an attractive option due to their compactness, very low losses leading to high radiation efficiencies (better than 95%) and fairly wide bandwidths compared to alternatives. DRA’s are also well suited for mobile communications since they can be placed on a ground plane and are by nature low gain antennas whose radiation patterns typically resemble those of short electric or magnetic dipoles.
One way to electronically reconfigure a DRA, in the sense of altering the frequency band over which the input reflection coefficient of the antenna is below some threshold, is to partially load one face of the DRA with a conducting surface. By altering the way in which this surface connects to the groundplane on which the DRA is mounted, the DRA can be reconfigured due to changes in its mode structure. This connection was first made using several conducting tabs which resulted in a tuning range of 69% while having poor cross polarization performance. In order to address the poor cross polarization performance a second conducting surface was placed on the opposing DRA wall. This technique significantly reduced the cross polarization levels while obtaining a tuning range of 83%. The dual-wall conductively loaded DRA was then extended to include a full electronic implementation using PIN diodes and varactor diodes in order to achieve discrete and continuous tuning respectively. The two techniques both achieved discrete tuning ranges of 95% while the varactor implementation also had a continuous tuning range of 59% while both maintaining an acceptable cross polarization level.
Subjects/Keywords: Antenna;
Continuous Tuning;
Dielectric Resonator Antenna;
Electrically Small Antenna;
Frequency Agile;
Multiband Antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Desjardins, J. (2011). Reconfigurable Dielectric Resonator Antennas
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/19838
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Desjardins, Jason. “Reconfigurable Dielectric Resonator Antennas
.” 2011. Thesis, University of Ottawa. Accessed March 04, 2021.
http://hdl.handle.net/10393/19838.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Desjardins, Jason. “Reconfigurable Dielectric Resonator Antennas
.” 2011. Web. 04 Mar 2021.
Vancouver:
Desjardins J. Reconfigurable Dielectric Resonator Antennas
. [Internet] [Thesis]. University of Ottawa; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10393/19838.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Desjardins J. Reconfigurable Dielectric Resonator Antennas
. [Thesis]. University of Ottawa; 2011. Available from: http://hdl.handle.net/10393/19838
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Dahal, Robi.
Design and performance analysis of purely textile antenna for wireless applications.
Degree: Mathematics and Natural Sciences, 2012, University of Gävle
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-11521
► This thesis work is concerned with the design and performance analysis of purely textile antenna for wireless applications. The materials used for radiating element,…
(more)
▼ This thesis work is concerned with the design and performance analysis of purely textile antenna for wireless applications. The materials used for radiating element, ground plane and dielectric substrate are purely textile. Two types of antennas are studied, the microstrip patch antenna and RFID tag antenna. Each type of antenna is designed and fabricated using two different conductive textile materials as radiating element.
The radiating element and ground plane of conventional printed antenna is manufactured with the metal plating on a solid dielectric substrate. The radiating element which is used in this thesis work has different characteristics as compared to printed antenna because it is made of conductive textile material which is less conductive than metal and elastic in nature. Each conductive textile material has different surface resistivity. The study has been made to analyze the effect on gain and radiation efficiency of the antenna when different conductive textile material is used as the radiating element. The measured results of the fabricated antennas present the full potential of conductive textile materials to be used as an antenna.
Subjects/Keywords: Textile antenna; RFID
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dahal, R. (2012). Design and performance analysis of purely textile antenna for wireless applications. (Thesis). University of Gävle. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-11521
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dahal, Robi. “Design and performance analysis of purely textile antenna for wireless applications.” 2012. Thesis, University of Gävle. Accessed March 04, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-11521.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dahal, Robi. “Design and performance analysis of purely textile antenna for wireless applications.” 2012. Web. 04 Mar 2021.
Vancouver:
Dahal R. Design and performance analysis of purely textile antenna for wireless applications. [Internet] [Thesis]. University of Gävle; 2012. [cited 2021 Mar 04].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-11521.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dahal R. Design and performance analysis of purely textile antenna for wireless applications. [Thesis]. University of Gävle; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-11521
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign
23.
Srivastava, Sakshi.
Investigating the role of antenna parameters in reducing interference.
Degree: MS, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/99263
► The frequency spectrum is a necessary resource for the proper functioning of wireless devices. With the unprecedented rise of wireless devices available to the public…
(more)
▼ The frequency spectrum is a necessary resource for the proper functioning of wireless devices. With the unprecedented rise of wireless devices available to the public comes inevitable congestion in the frequency spectrum. As this congestion is increasing, there is a pressing need to investigate ways to implement spectrum sharing, which is the idea that multiple wireless devices can use the same part of the spectrum as long as certain conditions are met. Since spectrum sharing may lead to interference, it is imperative to study those factors which contribute to interference, when interference becomes harmful, and how we can mitigate the effects of interference to have a more robust channel. This research focuses on exposing the ways in which
antenna radiation parameters like radiation pattern and polarization variability can be used to reduce interference. The pattern changing capabilities of a null steering
antenna are studied from the perspective of reducing interference in an indoor environment. For this, a reconfigurable null steering
antenna was simulated and fabricated. The field distribution from this
antenna was simulated in a two room setting to gauge the effects of multipath on the electric field distribution of the
antenna. In addition, a pseudo-indoor setup was designed by introducing metallic perturbations in a free space environment. The effect of the multipath created by the obstructions in the environment was manifested in the form of the change in depth of the null in the radiation pattern of the
antenna. While the null of the
antenna did not seem to be as effective in a multipath, indoor setting as compared to the free space scenario, the power in the direction of the null was still less than the power away from the null. Hence,
antenna features like beam steering, null steering, and pattern and polarization reconfigurability may be used as tools to reduce interference in an indoor setting.
Advisors/Committee Members: Bernhard, Jennifer T (advisor).
Subjects/Keywords: Antenna; Interference; Reconfigurability
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Srivastava, S. (2017). Investigating the role of antenna parameters in reducing interference. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99263
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Srivastava, Sakshi. “Investigating the role of antenna parameters in reducing interference.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed March 04, 2021.
http://hdl.handle.net/2142/99263.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Srivastava, Sakshi. “Investigating the role of antenna parameters in reducing interference.” 2017. Web. 04 Mar 2021.
Vancouver:
Srivastava S. Investigating the role of antenna parameters in reducing interference. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/2142/99263.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Srivastava S. Investigating the role of antenna parameters in reducing interference. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99263
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas Tech University
24.
Fleischmann, Amy.
An active retrodirective antenna array.
Degree: Electrical and Computer Engineering, 2011, Texas Tech University
URL: http://hdl.handle.net/2346/ETD-TTU-2011-08-1775
► Retrodirective antenna arrays utilize an array of antennas to redirect a signal back in the direction it originated from without use of digital circuitry, microcontrollers,…
(more)
▼ Retrodirective
antenna arrays utilize an array of antennas to redirect a signal back in the direction it originated from without use of digital circuitry, microcontrollers, or sophisticated signal processing algorithms. Passive retrodirective arrays, like the Van Atta array, use equal length transmission lines to redirect the signal. Active redrodirective arrays use mixers to create the phase conjugation necessary to redirecte the signal. Applications include high speed tracking, mobile communication, RADAR, and sensors. This thesis focuses on designing antennas for the retrodirective array to lay the groundwork for future enhancements. While patch and slot antennas are investigated, slot antennas are selected to provide a foundation for implementation of solar cells. Due to the bidirectional radiation pattern inherent to slot antennas, a high impedance ground plane is investigated for its low profile reflecting properties. This metamaterial based plane is comprised of mushroom type structures than exhibit useful properties in their respective electromagnetic bandgap. By using this high impedance plane in association with the retrodirective array, the foundation for implementation of solar cells is set for a solar
antenna based retrodirective array.
Advisors/Committee Members: Saed, Mohammed (Committee Chair), Li, Changzhi (committee member).
Subjects/Keywords: Retrodirective antenna array
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APA (6th Edition):
Fleischmann, A. (2011). An active retrodirective antenna array. (Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/ETD-TTU-2011-08-1775
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fleischmann, Amy. “An active retrodirective antenna array.” 2011. Thesis, Texas Tech University. Accessed March 04, 2021.
http://hdl.handle.net/2346/ETD-TTU-2011-08-1775.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fleischmann, Amy. “An active retrodirective antenna array.” 2011. Web. 04 Mar 2021.
Vancouver:
Fleischmann A. An active retrodirective antenna array. [Internet] [Thesis]. Texas Tech University; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/2346/ETD-TTU-2011-08-1775.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fleischmann A. An active retrodirective antenna array. [Thesis]. Texas Tech University; 2011. Available from: http://hdl.handle.net/2346/ETD-TTU-2011-08-1775
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Southern California
25.
Yang, Jeffrey Ming-Jer.
Analysis and design of wideband array antennas.
Degree: PhD, Electrical Engineering, 2012, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/429683/rec/801
► An array antenna consists of a group of radiating elements forming a single aperture to transmit and receive electromagnetic energy. This work focuses on the…
(more)
▼ An array
antenna consists of a group of radiating
elements forming a single aperture to transmit and receive
electromagnetic energy. This work focuses on the analysis,
development, and design of array antennas geared towards operation
over wide frequency bandwidths. As a consequence of the present
effort, both the geometry and the operation theory of a louver
array
antenna are developed, and their use in wide-band
antenna
arrays investigated.; This dissertation begins by first
establishing the electromagnetic boundary condition associated with
the radiating aperture of an
antenna array made of identical cells.
Then, it proceeds to impose this condition on Maxwell's equations
to yield the array radiated field as an infinite plane wave
spectrum.; To properly investigate the energy transfer efficiency
of an array, from circuit to free space, the Poynting theorem is
used to determine the power balance equation of the
antenna. From
this analysis, an aperture reflection coefficient is defined and
introduced as a convenient figure-of-merit to gauge the
effectiveness of the
antenna as an energy transducer. For
demonstration purposes, this aperture reflection coefficient is
then applied to study the characteristics of the frequently used
rectangular microstrip patch array. It is shown that the patch
array geometry is prone to excite evanescent fields (i.e., store
reactive energy) in its aperture region, causing it to require a
highly reactive, and therefore narrow band, matching network behind
each element to ensure proper operation. In contrast, the louver
array primarily excites a dominant mode field that exactly emulates
the desired radiated plane wave, with nearly no evanescent field
generation. Since a band-limiting matching structure is not
required (to compensate evanescent fields), the louver
antenna is
inherently wideband. In addition to this fact, the louver
antenna
is amenable to be integrated directly with semiconductor
electronics. This feature allows the future implementation of a
densely populated array
antenna with fractional wavelength element
spacing to enable broad band, wide angle, grating-lobe-free beam
scan.; Even though no experimental work was performed for this
research, a systematic array design and analysis procedure is
presented at the end of this dissertation. To demonstrate their
application, a louver array
antenna is then designed for a 30-to-1
operation frequency band. As a preliminary validation, this louver
array is then modeled using an established commercial
finite-element numerical analysis software. Both the analytically
and the numerically predicted array performances obtained show
close agreement. This validates the design and analysis procedures
presented, as well as demonstrate their applicability for
implementing high efficiency, wideband, wide scan angle array
antennas.
Advisors/Committee Members: Prata, Aluizio (Committee Chair), Steier, William H. (Committee Member), Scholtz, Robert A. (Committee Member), Pilch, Krzysztof (Committee Member).
Subjects/Keywords: wideband; array; antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yang, J. M. (2012). Analysis and design of wideband array antennas. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/429683/rec/801
Chicago Manual of Style (16th Edition):
Yang, Jeffrey Ming-Jer. “Analysis and design of wideband array antennas.” 2012. Doctoral Dissertation, University of Southern California. Accessed March 04, 2021.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/429683/rec/801.
MLA Handbook (7th Edition):
Yang, Jeffrey Ming-Jer. “Analysis and design of wideband array antennas.” 2012. Web. 04 Mar 2021.
Vancouver:
Yang JM. Analysis and design of wideband array antennas. [Internet] [Doctoral dissertation]. University of Southern California; 2012. [cited 2021 Mar 04].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/429683/rec/801.
Council of Science Editors:
Yang JM. Analysis and design of wideband array antennas. [Doctoral Dissertation]. University of Southern California; 2012. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/429683/rec/801

University of Hawaii – Manoa
26.
Yu, Jay Jaekyum.
Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications.
Degree: 2016, University of Hawaii – Manoa
URL: http://hdl.handle.net/10125/101583
► M.S. University of Hawaii at Manoa 2011.
Over the past several decades, parasitic array antennas have been widely used in the long distance wireless communications…
(more)
▼ M.S. University of Hawaii at Manoa 2011.
Over the past several decades, parasitic array antennas have been widely used in the long distance wireless communications applications due to the simple structure and high gain achievement. Recently, small yet multi-functional antennas have become an increasing demand for modern wireless communications devices. The traditional parasitic array antennas, however, are not suitable for modern wireless systems because of various disadvantages such as single band operation, narrow bandwidth, large physical size, and linear polarized radiation. This thesis examines new designs of multi-functional parasitic array antennas to meet the demands of current wireless systems. First, as a ground work, designs of compact-sized, multi-band parasitic array antennas with the use of helical-shaped directors are investigated. Then additional functionality, frequency tunability is demonstrated. In addition, electrically small and printable parasitic array antennas with dual bands capability are proposed. Finally, aside from the multi-band antenna, an electrically small, circularly polarized parasitic array antenna is explored.
Subjects/Keywords: multi-band antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yu, J. J. (2016). Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/101583
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yu, Jay Jaekyum. “Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications.” 2016. Thesis, University of Hawaii – Manoa. Accessed March 04, 2021.
http://hdl.handle.net/10125/101583.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yu, Jay Jaekyum. “Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications.” 2016. Web. 04 Mar 2021.
Vancouver:
Yu JJ. Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10125/101583.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yu JJ. Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/101583
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
27.
Sotoodeh, Zahra.
Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna.
Degree: 2011, University of Waterloo
URL: http://hdl.handle.net/10012/6402
► The demand for high data rate transfers in short range areas have been increasing significantly. Millimeter wave communication systems can fulfill the requirements for such…
(more)
▼ The demand for high data rate transfers in short range areas have been increasing significantly. Millimeter wave communication systems can fulfill the requirements for such applications due to the availability of wide bandwidths at these frequencies. Particularly, 60 GHz frequency band is more appropriate among other mm-wave bands because of the oxygen energy absorption resonance at this frequency.
Millimeter wave antennas are one of the desired components in short range wireless communications. High gain and broadband antennas are required for this purpose.
In this study, a fully planar 60 GHz antenna is introduced. Tapered dielectric rod antenna is chosen to achieve high radiation efficiency. The antenna is designed on two common substrates with high permittivity: alumina (Al2O3) and high resistive Silicon. Both substrates are very low loss and many designs for front-end components are developed on these substrates due to their high permittivity. In other words, the proposed antenna can be integrated with the front-end platform in the same substrate. In addition, the antenna feeding is the CPW line which makes it a convenient solution for integration of the antenna with RF front-ends such as MMICs or MEMS circuits in this range of frequency.
Subjects/Keywords: mm-wave; antenna
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sotoodeh, Z. (2011). Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/6402
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sotoodeh, Zahra. “Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna.” 2011. Thesis, University of Waterloo. Accessed March 04, 2021.
http://hdl.handle.net/10012/6402.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sotoodeh, Zahra. “Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna.” 2011. Web. 04 Mar 2021.
Vancouver:
Sotoodeh Z. Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10012/6402.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sotoodeh Z. Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/6402
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University
28.
Schuster, Matthew.
Optical Antenna Photovoltaics & Making Metallic Nano-rods
.
Degree: Chemistry, 2013, Queens University
URL: http://hdl.handle.net/1974/7727
► Solar power is a clean, renewable source of energy. There is a growing demand for cheap, high efficiency photovoltaic cells. Of the many emerging solar…
(more)
▼ Solar power is a clean, renewable source of energy. There is a growing demand for cheap, high efficiency photovoltaic cells. Of the many emerging solar harvesting technologies, a concept that has not been widely explored is that of optical antennas.
In 1972 Bailey et al.[1] explored scaling down of antenna technology to match the solar spectrum. A recent review was given by Lukas Novotny et al.[2], in which they outline the major hurdles as being the lack of reliable nano-fabrication and an inability to rectify into the Tera-hertz frequencies band.
Presently we aim to fabricate photovoltaic cells that incorporate an array of vertically aligned metallic nano-rods (MNR). Porous aluminum oxide (PAO) is used as a nano-structured template for growth of the MNR. PAO exhibit vertically aligned pores (D = 20 - 200nm) in a densely packed hexagonal arrangement. MNR fabrication is achieved through templated electrochemical deposition, and investigated with SEM and VIS-IR spectroscopy.
MNR samples have been specifically designed to be incorporated as a photoactive material for a novel photovoltaic cell. Through fine control of their length, the
MNR excitation energy can be tuned to the visible spectrum. Excitation of the MNR leads to energy transfer with localized acceptor molecules, creating a rectification of the field. The fabrication of MNR helps progress the development of the proposed antenna photovoltaic device.
[1] R. L. Bailey, “A Proposed New Concept for a Solar-Energy Converter," Journal
of Engineering for Power, pp. 73-77, Apr. 1972.
[2] P. Bharadwaj, B. Deutsch, and L. Novotny, “Optical Antennas," Advances in
Optics and Photonics, vol. 1, pp. 438-483, May 2009.
Subjects/Keywords: Optical Antenna
;
Nanorods
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Schuster, M. (2013). Optical Antenna Photovoltaics & Making Metallic Nano-rods
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/7727
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Schuster, Matthew. “Optical Antenna Photovoltaics & Making Metallic Nano-rods
.” 2013. Thesis, Queens University. Accessed March 04, 2021.
http://hdl.handle.net/1974/7727.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Schuster, Matthew. “Optical Antenna Photovoltaics & Making Metallic Nano-rods
.” 2013. Web. 04 Mar 2021.
Vancouver:
Schuster M. Optical Antenna Photovoltaics & Making Metallic Nano-rods
. [Internet] [Thesis]. Queens University; 2013. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1974/7727.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Schuster M. Optical Antenna Photovoltaics & Making Metallic Nano-rods
. [Thesis]. Queens University; 2013. Available from: http://hdl.handle.net/1974/7727
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales
29.
Hossain, Md. Selim.
Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors.
Degree: Engineering & Information Technology Canberra, 2014, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/53280
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11975/SOURCE02?view=true
► Broadband beamforming plays an important role in many applications involving antennaarray signal processing such as communications, radar, sonar, imaging, geophysicalexploration, astrophysical exploration and biomedical diagnostics.…
(more)
▼ Broadband beamforming plays an important role in many applications involving antennaarray signal processing such as communications, radar, sonar, imaging, geophysicalexploration, astrophysical exploration and biomedical diagnostics. The traditionalapproaches to broadband beamforming use tapped delay line filter architectures, wherethe weights of the filters are chosen by optimization algorithms. Unfortunately, theseapproaches have some limitations. Firstly, large matrices need to be manipulated to estimate the filter coefficients and the necessary steering delays are cumbersome to implement, with implementation errors causing loss of system performance. Secondly, when some imperfections occur in the array, the resulting mismatch in array responses causesdegradation in the beamformer performance. Therefore, the need for robust beamforming arises in many practical applications. Additionally, the placement of nulls in the array pattern is also a vital issue for cancelling slow moving jammers and known unwanted directional sources. Moreover, the traditional techniques have difficulties incontrolling side lobe level regardless of the main lobe position in the array pattern.This thesis presents algorithms for broadband beamforming that overcomes these limitations.The result is a computationally efficient beamformer that does not require presteering delays. A unique feature of these new algorithms is inherent robustness toarray imperfections, giving the user some degree of flexibility in choosing array parameters.The thesis also discusses techniques for broadband pattern synthesis. Thesetechniques are designed to produce isolated point and broad sector spatial nulls in thepresence of array imperfections. Moreover, a robust Chebyshev broadband
antenna arraypattern synthesis technique is proposed to achieve a specified side lobe level withinterference cancellation capabilities.The thesis also presents broadband arrays having circular and concentric circular antennaelement geometries, where these arrays are able to scan a beam through entirespace with little change in either the beamwidth or the side lobe level. The performanceof this proposed processor is compared with the performance of existing broadbandprocessors and shows that the limitations of steering delays, computational cost, robustness,equal side lobe level, null placement and array geometries can be overcome by theuse of the robust broadband methods presented in this thesis.
Advisors/Committee Members: Milford, Greg , Engineering & Information Technology, UNSW Canberra, UNSW, Reed, Mark, Engineering & Information Technology, UNSW Canberra, UNSW.
Subjects/Keywords: Antenna Arrays; Beamforming
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hossain, M. S. (2014). Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53280 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11975/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Hossain, Md Selim. “Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors.” 2014. Doctoral Dissertation, University of New South Wales. Accessed March 04, 2021.
http://handle.unsw.edu.au/1959.4/53280 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11975/SOURCE02?view=true.
MLA Handbook (7th Edition):
Hossain, Md Selim. “Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors.” 2014. Web. 04 Mar 2021.
Vancouver:
Hossain MS. Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors. [Internet] [Doctoral dissertation]. University of New South Wales; 2014. [cited 2021 Mar 04].
Available from: http://handle.unsw.edu.au/1959.4/53280 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11975/SOURCE02?view=true.
Council of Science Editors:
Hossain MS. Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors. [Doctoral Dissertation]. University of New South Wales; 2014. Available from: http://handle.unsw.edu.au/1959.4/53280 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11975/SOURCE02?view=true
30.
Bhat, Anupama.
Field Enhancement And Far-Field Radiation Using Parabolic Optical Antenna.
Degree: 2012, University of Nevada – Reno
URL: http://hdl.handle.net/11714/3723
► Optical antennas are metal nano structures that convert strongly localized energy into radiation and vice versa with a high throughput. Metals are not perfect conductors…
(more)
▼ Optical antennas are metal nano structures that convert strongly localized energy into radiation and vice versa with a high throughput. Metals are not perfect conductors at optical frequencies and their optical properties are strongly affected by the existence of Surface Plasmon Polariton (SSP) resonances. These modes are highly confined and can be controlled at the nano scale by shape and size of metals.Although the principles of nano-optical antennas have been derived from conventional antennas, but the quantitative evaluation of antennas cannot be simply scaled down for nano antennas owing to the unusual behavior of metals at optical frequencies. Since the behavior of such nano antennas is dominated by surface Plasmon resonances, a numerical solution/simulation based on Maxwell's equation is necessary to study the effects of size of nano
antenna, dielectric and illumination conditions on the field.The focus of this thesis is to analyze the scattered field of gold parabolic nano-disc. The research is based on the theory of conventional parabolic dish as an efficient structure for transmission and reception of energy. The field profile of the nano-disc provides insight into the behavior of the disc with respect to directivity, gain and field enhancement. This leads to the plasmonic applications in lasing cavities, photo voltaic cells, microscopy and spectroscopy. The simulation is carried out in COMSOL MULTIPHYSICS as it incorporates the Finite Element method (FEM) to solve the equations with the boundary condition.
Advisors/Committee Members: Rawat, Banmali S. (advisor), Chandra, Dhanesh (committee member), Zhu, Xiaoshan (committee member).
Subjects/Keywords: Antenna; Optical; Parabolic
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bhat, A. (2012). Field Enhancement And Far-Field Radiation Using Parabolic Optical Antenna. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/3723
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bhat, Anupama. “Field Enhancement And Far-Field Radiation Using Parabolic Optical Antenna.” 2012. Thesis, University of Nevada – Reno. Accessed March 04, 2021.
http://hdl.handle.net/11714/3723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bhat, Anupama. “Field Enhancement And Far-Field Radiation Using Parabolic Optical Antenna.” 2012. Web. 04 Mar 2021.
Vancouver:
Bhat A. Field Enhancement And Far-Field Radiation Using Parabolic Optical Antenna. [Internet] [Thesis]. University of Nevada – Reno; 2012. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/11714/3723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bhat A. Field Enhancement And Far-Field Radiation Using Parabolic Optical Antenna. [Thesis]. University of Nevada – Reno; 2012. Available from: http://hdl.handle.net/11714/3723
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
◁ [1] [2] [3] [4] [5] … [79] ▶
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