subject:(Antenna)

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)

Subjects/Keywords: Annular Ring Antenna; Microstrip Antenna

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APA (6^th 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 (16^th Edition):

Mahajan, Madhurika. “Some Studies on Circular and Annular Ring Microstrip Antennas;.” 2013. Thesis, Jaypee University of Information Technology, Solan. Accessed February 17, 2020. 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 (7^th Edition):

Mahajan, Madhurika. “Some Studies on Circular and Annular Ring Microstrip Antennas;.” 2013. Web. 17 Feb 2020.

Vancouver:

Mahajan M. Some Studies on Circular and Annular Ring Microstrip Antennas;. [Internet] [Thesis]. Jaypee University of Information Technology, Solan; 2013. [cited 2020 Feb 17]. 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)

Subjects/Keywords: Patch Antenna

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APA (6^th 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 (16^th 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 February 17, 2020. 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 (7^th 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. 17 Feb 2020.

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 2020 Feb 17]. 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

University of Johannesburg

3. 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)

Subjects/Keywords: Antenna arrays

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APA (6^th 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 (16^th Edition):

Van Wyk, Michael Antonie. “Toepassing van komplekse ruimtelike interpolasie in rignetantennes.” 2014. Thesis, University of Johannesburg. Accessed February 17, 2020. 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 (7^th Edition):

Van Wyk, Michael Antonie. “Toepassing van komplekse ruimtelike interpolasie in rignetantennes.” 2014. Web. 17 Feb 2020.

Vancouver:

Van Wyk MA. Toepassing van komplekse ruimtelike interpolasie in rignetantennes. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2020 Feb 17]. 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

Penn State University

4. Yue, Taiwei. ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.

Degree: 2018, Penn State University

URL: https://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.

Subjects/Keywords: Antenna; Metasurface

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APA (6^th Edition):

Yue, T. (2018). ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. (Thesis). Penn State University. Retrieved from https://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 (16^th Edition):

Yue, Taiwei. “ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.” 2018. Thesis, Penn State University. Accessed February 17, 2020. https://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 (7^th Edition):

Yue, Taiwei. “ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.” 2018. Web. 17 Feb 2020.

Vancouver:

Yue T. ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. [Internet] [Thesis]. Penn State University; 2018. [cited 2020 Feb 17]. Available from: https://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://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 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 (6^th 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 (16^th Edition):

Liu, Yanxia. “Gain and efficiency enhancement of the miniaturized split ring based antennas.” 2016. Masters Thesis, University of Manitoba. Accessed February 17, 2020. http://hdl.handle.net/1993/32756.

MLA Handbook (7^th Edition):

Liu, Yanxia. “Gain and efficiency enhancement of the miniaturized split ring based antennas.” 2016. Web. 17 Feb 2020.

Vancouver:

Liu Y. Gain and efficiency enhancement of the miniaturized split ring based antennas. [Internet] [Masters thesis]. University of Manitoba; 2016. [cited 2020 Feb 17]. 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

Georgia Tech

6. 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)

Subjects/Keywords: Plasma; Antenna

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APA (6^th 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 (16^th Edition):

Chan, Cheong Yu. “Experimental investigation of fast plasma production for the VAIPER antenna.” 2017. Masters Thesis, Georgia Tech. Accessed February 17, 2020. http://hdl.handle.net/1853/59307.

MLA Handbook (7^th Edition):

Chan, Cheong Yu. “Experimental investigation of fast plasma production for the VAIPER antenna.” 2017. Web. 17 Feb 2020.

Vancouver:

Chan CY. Experimental investigation of fast plasma production for the VAIPER antenna. [Internet] [Masters thesis]. Georgia Tech; 2017. [cited 2020 Feb 17]. 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

7. 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)

Subjects/Keywords: Antenna; LTE

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APA (6^th 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 (16^th Edition):

Islam, Jahurul. “Antenna Design for Portable Applications in LTE Band.” 2011. Thesis, University of Gävle. Accessed February 17, 2020. 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 (7^th Edition):

Islam, Jahurul. “Antenna Design for Portable Applications in LTE Band.” 2011. Web. 17 Feb 2020.

Vancouver:

Islam J. Antenna Design for Portable Applications in LTE Band. [Internet] [Thesis]. University of Gävle; 2011. [cited 2020 Feb 17]. 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

University of Minnesota

8. 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 (6^th 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 (16^th Edition):

Bereka, Desalegn. “60GHz Integrated On-chip Antenna on Silicon for High Speed Applications.” 2015. Doctoral Dissertation, University of Minnesota. Accessed February 17, 2020. http://hdl.handle.net/11299/175228.

MLA Handbook (7^th Edition):

Bereka, Desalegn. “60GHz Integrated On-chip Antenna on Silicon for High Speed Applications.” 2015. Web. 17 Feb 2020.

Vancouver:

Bereka D. 60GHz Integrated On-chip Antenna on Silicon for High Speed Applications. [Internet] [Doctoral dissertation]. University of Minnesota; 2015. [cited 2020 Feb 17]. 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

9. 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 (6^th 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 (16^th 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 February 17, 2020. https://scholar.colorado.edu/ecen_gradetds/28.

MLA Handbook (7^th Edition):

Radway, Matthew John. “Mode Theory of Multi-Armed Spiral Antennas and Its Application to Electronic Warfare Antennas.” 2011. Web. 17 Feb 2020.

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 2020 Feb 17]. 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

10. 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)

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 (6^th 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 (16^th Edition):

Saif, Khalid. “Mobile Phone Antenna Design.” 2015. Thesis, , Department of Applied Signal Processing. Accessed February 17, 2020. 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 (7^th Edition):

Saif, Khalid. “Mobile Phone Antenna Design.” 2015. Web. 17 Feb 2020.

Vancouver:

Saif K. Mobile Phone Antenna Design. [Internet] [Thesis]. , Department of Applied Signal Processing; 2015. [cited 2020 Feb 17]. 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

Université de Grenoble

11. 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 (6^th 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 (16^th Edition):

Nambiar, Siddhath. “Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices.” 2012. Doctoral Dissertation, Université de Grenoble. Accessed February 17, 2020. http://www.theses.fr/2012GRENY099.

MLA Handbook (7^th Edition):

Nambiar, Siddhath. “Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices.” 2012. Web. 17 Feb 2020.

Vancouver:

Nambiar S. Dispositifs électrooptique assistés plasmon en silicium : Plasmons assisted Si electro-optical devices. [Internet] [Doctoral dissertation]. Université de Grenoble; 2012. [cited 2020 Feb 17]. 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

University of Akron

12. 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 (6^th 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 (16^th Edition):

Nelakonda, Nikitha. “Design of Robust Superdirective Receiving Antenna Array for Circular, Hexagonal and Elliptical Geometries.” 2016. Masters Thesis, University of Akron. Accessed February 17, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460984746.

MLA Handbook (7^th Edition):

Nelakonda, Nikitha. “Design of Robust Superdirective Receiving Antenna Array for Circular, Hexagonal and Elliptical Geometries.” 2016. Web. 17 Feb 2020.

Vancouver:

Nelakonda N. Design of Robust Superdirective Receiving Antenna Array for Circular, Hexagonal and Elliptical Geometries. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2020 Feb 17]. 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

NSYSU

13. 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)

Subjects/Keywords: multiband antenna; LTE; MIMO; isolation enhancement; Antenna

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APA (6^th 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 (16^th Edition):

Fang, Chi-Rung. “Mobile Devices Antenna for LTE MIMO Operations.” 2014. Thesis, NSYSU. Accessed February 17, 2020. 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 (7^th Edition):

Fang, Chi-Rung. “Mobile Devices Antenna for LTE MIMO Operations.” 2014. Web. 17 Feb 2020.

Vancouver:

Fang C. Mobile Devices Antenna for LTE MIMO Operations. [Internet] [Thesis]. NSYSU; 2014. [cited 2020 Feb 17]. 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

Virginia Tech

14. 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)

Subjects/Keywords: antenna; helical antenna

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APA (6^th 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 (16^th Edition):

Barts, Robert Michael. “The Stub Loaded Helix: A Reduced Size Helical Antenna.” 2003. Doctoral Dissertation, Virginia Tech. Accessed February 17, 2020. http://hdl.handle.net/10919/29728.

MLA Handbook (7^th Edition):

Barts, Robert Michael. “The Stub Loaded Helix: A Reduced Size Helical Antenna.” 2003. Web. 17 Feb 2020.

Vancouver:

Barts RM. The Stub Loaded Helix: A Reduced Size Helical Antenna. [Internet] [Doctoral dissertation]. Virginia Tech; 2003. [cited 2020 Feb 17]. 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

University of Alberta

15. 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 (6^th 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 (16^th Edition):

Moghadas, Hamid. “Analysis and Design of MEMS-Based Multi-Functional Aperture Antennas.” 2014. Doctoral Dissertation, University of Alberta. Accessed February 17, 2020. https://era.library.ualberta.ca/files/c2j62s5037.

MLA Handbook (7^th Edition):

Moghadas, Hamid. “Analysis and Design of MEMS-Based Multi-Functional Aperture Antennas.” 2014. Web. 17 Feb 2020.

Vancouver:

Moghadas H. Analysis and Design of MEMS-Based Multi-Functional Aperture Antennas. [Internet] [Doctoral dissertation]. University of Alberta; 2014. [cited 2020 Feb 17]. 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

University of Hawaii – Manoa

16. 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)

Subjects/Keywords: multi-band antenna

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APA (6^th 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 (16^th Edition):

Yu, Jay Jaekyum. “Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications.” 2016. Thesis, University of Hawaii – Manoa. Accessed February 17, 2020. 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 (7^th Edition):

Yu, Jay Jaekyum. “Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications.” 2016. Web. 17 Feb 2020.

Vancouver:

Yu JJ. Analysis and design of multi-functional, parasitic array antennas for optimized wireless communications. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2020 Feb 17]. 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

Wright State University

17. Ewing, Jordan Jeffrey. Electromagnetic Properties of Fractal Antennas.

Degree: MS, Physics, 2018, Wright State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=wright1527788771912581

► Finite element method analysis is used to conduct electromagnetic simulations to characterize fractal antennas. This work considers wire (1D) antennas such as the triadic Koch… (more)

Subjects/Keywords: Physics; Fractal; Antenna

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APA (6^th Edition):

Ewing, J. J. (2018). Electromagnetic Properties of Fractal Antennas. (Masters Thesis). Wright State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=wright1527788771912581

Chicago Manual of Style (16^th Edition):

Ewing, Jordan Jeffrey. “Electromagnetic Properties of Fractal Antennas.” 2018. Masters Thesis, Wright State University. Accessed February 17, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527788771912581.

MLA Handbook (7^th Edition):

Ewing, Jordan Jeffrey. “Electromagnetic Properties of Fractal Antennas.” 2018. Web. 17 Feb 2020.

Vancouver:

Ewing JJ. Electromagnetic Properties of Fractal Antennas. [Internet] [Masters thesis]. Wright State University; 2018. [cited 2020 Feb 17]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1527788771912581.

Council of Science Editors:

Ewing JJ. Electromagnetic Properties of Fractal Antennas. [Masters Thesis]. Wright State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1527788771912581

University of Southern California

18. 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 (6^th 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 (16^th Edition):

Yang, Jeffrey Ming-Jer. “Analysis and design of wideband array antennas.” 2012. Doctoral Dissertation, University of Southern California. Accessed February 17, 2020. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/429683/rec/801.

MLA Handbook (7^th Edition):

Yang, Jeffrey Ming-Jer. “Analysis and design of wideband array antennas.” 2012. Web. 17 Feb 2020.

Vancouver:

Yang JM. Analysis and design of wideband array antennas. [Internet] [Doctoral dissertation]. University of Southern California; 2012. [cited 2020 Feb 17]. 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

Delft University of Technology

19. Azodi, H. UWB Air-Coupled Antenna for Ground Penetrating Radar:.

Degree: 2010, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:649b2907-5193-485b-b9ea-61d322ea2339

► Ground Penetrating Radar (GPR) is a promising technology to detect buried objects beneath or near ground surface. To achieve high-resolution and accurate enough images, the… (more)

Subjects/Keywords: antenna; GPR; UWB

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APA (6^th Edition):

Azodi, H. (2010). UWB Air-Coupled Antenna for Ground Penetrating Radar:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:649b2907-5193-485b-b9ea-61d322ea2339

Chicago Manual of Style (16^th Edition):

Azodi, H. “UWB Air-Coupled Antenna for Ground Penetrating Radar:.” 2010. Masters Thesis, Delft University of Technology. Accessed February 17, 2020. http://resolver.tudelft.nl/uuid:649b2907-5193-485b-b9ea-61d322ea2339.

MLA Handbook (7^th Edition):

Azodi, H. “UWB Air-Coupled Antenna for Ground Penetrating Radar:.” 2010. Web. 17 Feb 2020.

Vancouver:

Azodi H. UWB Air-Coupled Antenna for Ground Penetrating Radar:. [Internet] [Masters thesis]. Delft University of Technology; 2010. [cited 2020 Feb 17]. Available from: http://resolver.tudelft.nl/uuid:649b2907-5193-485b-b9ea-61d322ea2339.

Council of Science Editors:

Azodi H. UWB Air-Coupled Antenna for Ground Penetrating Radar:. [Masters Thesis]. Delft University of Technology; 2010. Available from: http://resolver.tudelft.nl/uuid:649b2907-5193-485b-b9ea-61d322ea2339

University of Ottawa

20. 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 (6^th 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 (16^th Edition):

Desjardins, Jason. “Reconfigurable Dielectric Resonator Antennas .” 2011. Thesis, University of Ottawa. Accessed February 17, 2020. 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 (7^th Edition):

Desjardins, Jason. “Reconfigurable Dielectric Resonator Antennas .” 2011. Web. 17 Feb 2020.

Vancouver:

Desjardins J. Reconfigurable Dielectric Resonator Antennas . [Internet] [Thesis]. University of Ottawa; 2011. [cited 2020 Feb 17]. 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

University of Adelaide

21. Nguyen Trong, Nghia. Analysis, design and optimisation of various antenna types based on equivalent magnetic-current concept.

Degree: 2017, University of Adelaide

URL: http://hdl.handle.net/2440/115415

► The field equivalence principle is a classical technique, simple to use but remarkably effective to analyse aperture antennas. For most of thin planar structures, the… (more)

▼ The field equivalence principle is a classical technique, simple to use but remarkably effective to analyse aperture antennas. For most of thin planar structures, the aperture can be approximated as perfect magnetic conductor. Thus, the field equivalence principle typically yields a well-approximated equivalent problem that is much easier to solve than the original geometry. Inspired by this principle, a wide range of novel antenna structures are proposed in this thesis. These structures are further developed, optimised and tailored for various practical applications. Three main types of antennas are investigated, including travelling-wave antennas, low-profile monopolar antennas and reconfigurable antennas, corresponding to three major parts of this dissertation. The first part examines various realisations of travelling-wave half-mode substrate- integrated waveguide (HMSIW) antennas and their optimisations. This type of antenna is equivalent to a magnetic dipole. In this part, the core contribution is a generalised semi-analytical model to effectively analyse continuous-source travelling-wave antennas, based on which different optimisation techniques for bandwidth and radiation patterns are proposed. An optimisation procedure that includes parameter uncertainties is also demonstrated. The second part focuses on a type of low-profile monopolar antennas that can be interpreted as magnetic-current loops using the field equivalence principle. The main contributions are different configurations of symmetrical radiating slots that act as additional magnetic-current loop sources. The last major part covers a wide range of reconfigurable antennas targeting various applications. These includes a family of stub-loaded substrate-integrated antennas, a circular resonant cavity, and low-profile monopolar antennas that have been introduced in the second major part. These antennas not only cover three main application types of reconfigurable antennas, i.e. frequency- , polarisation-, and pattern-tunability, but also combine those in a single device. Moreover, significant improvements in performances compared to antennas available in the literature are demonstrated. Overall, the thesis provides different frameworks to design many types of antennas. The analytical models, using the field equivalence principle as a common fundamental technique, provide not only thorough understandings on antennas’ radiation mechanisms but also an effective means for rapid antenna optimisations. Advisors/Committee Members: Fumeaux, Christophe (advisor), Kaufmann, Thomas (advisor), School of Electrical and Electronic Engineering (school).

Subjects/Keywords: field equivalence principle; magnetic current; leaky-wave antenna; travelling-wave antenna; monopolar antenna; reconfigurable antenna

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APA (6^th Edition):

Nguyen Trong, N. (2017). Analysis, design and optimisation of various antenna types based on equivalent magnetic-current concept. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/115415

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nguyen Trong, Nghia. “Analysis, design and optimisation of various antenna types based on equivalent magnetic-current concept.” 2017. Thesis, University of Adelaide. Accessed February 17, 2020. http://hdl.handle.net/2440/115415.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nguyen Trong, Nghia. “Analysis, design and optimisation of various antenna types based on equivalent magnetic-current concept.” 2017. Web. 17 Feb 2020.

Vancouver:

Nguyen Trong N. Analysis, design and optimisation of various antenna types based on equivalent magnetic-current concept. [Internet] [Thesis]. University of Adelaide; 2017. [cited 2020 Feb 17]. Available from: http://hdl.handle.net/2440/115415.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nguyen Trong N. Analysis, design and optimisation of various antenna types based on equivalent magnetic-current concept. [Thesis]. University of Adelaide; 2017. Available from: http://hdl.handle.net/2440/115415

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

22. 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)

Subjects/Keywords: Antenna; Holography; 0544

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APA (6^th 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 (16^th Edition):

Chen, Michael S. “Manipulating Antenna Radiation with Angle Holography.” 2015. Masters Thesis, University of Toronto. Accessed February 17, 2020. http://hdl.handle.net/1807/69610.

MLA Handbook (7^th Edition):

Chen, Michael S. “Manipulating Antenna Radiation with Angle Holography.” 2015. Web. 17 Feb 2020.

Vancouver:

Chen MS. Manipulating Antenna Radiation with Angle Holography. [Internet] [Masters thesis]. University of Toronto; 2015. [cited 2020 Feb 17]. 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 New South Wales

23. 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 (6^th 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 (16^th Edition):

Hossain, Md Selim. “Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors.” 2014. Doctoral Dissertation, University of New South Wales. Accessed February 17, 2020. http://handle.unsw.edu.au/1959.4/53280 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11975/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Hossain, Md Selim. “Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors.” 2014. Web. 17 Feb 2020.

Vancouver:

Hossain MS. Efficient and Robust Beamforming Algorithms for Broadband Antenna Array Processors. [Internet] [Doctoral dissertation]. University of New South Wales; 2014. [cited 2020 Feb 17]. 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

University of Waterloo

24. 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)

Subjects/Keywords: mm-wave; antenna

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APA (6^th 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 (16^th Edition):

Sotoodeh, Zahra. “Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna.” 2011. Thesis, University of Waterloo. Accessed February 17, 2020. 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 (7^th Edition):

Sotoodeh, Zahra. “Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna.” 2011. Web. 17 Feb 2020.

Vancouver:

Sotoodeh Z. Design of a mm-wave Planar CPW-fed Tapered Dielectric Rod Antenna. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2020 Feb 17]. 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

25. 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)

Subjects/Keywords: Optical Antenna; Nanorods

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APA (6^th 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 (16^th Edition):

Schuster, Matthew. “Optical Antenna Photovoltaics & Making Metallic Nano-rods .” 2013. Thesis, Queens University. Accessed February 17, 2020. 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 (7^th Edition):

Schuster, Matthew. “Optical Antenna Photovoltaics & Making Metallic Nano-rods .” 2013. Web. 17 Feb 2020.

Vancouver:

Schuster M. Optical Antenna Photovoltaics & Making Metallic Nano-rods . [Internet] [Thesis]. Queens University; 2013. [cited 2020 Feb 17]. 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

26. 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)

Subjects/Keywords: Textile antenna; RFID

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APA (6^th 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 (16^th Edition):

Dahal, Robi. “Design and performance analysis of purely textile antenna for wireless applications.” 2012. Thesis, University of Gävle. Accessed February 17, 2020. 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 (7^th Edition):

Dahal, Robi. “Design and performance analysis of purely textile antenna for wireless applications.” 2012. Web. 17 Feb 2020.

Vancouver:

Dahal R. Design and performance analysis of purely textile antenna for wireless applications. [Internet] [Thesis]. University of Gävle; 2012. [cited 2020 Feb 17]. 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

27. Griffin, Anthony Samuel. Embedded microvascular networks for electronically reconfigurable materials.

Degree: MS, Materials Science & Engineering, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/88313

► Microvascular networks in biological systems carry out various functions, such as damage repair, temperature regulation, and nutrient transport. Biological vasculature has inspired the use of… (more)

Subjects/Keywords: microvascular; reconfigurable antenna; coplanar waveguide; patch antenna; microfluidic; microchannel; tunable antenna

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APA (6^th Edition):

Griffin, A. S. (2015). Embedded microvascular networks for electronically reconfigurable materials. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/88313

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Griffin, Anthony Samuel. “Embedded microvascular networks for electronically reconfigurable materials.” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed February 17, 2020. http://hdl.handle.net/2142/88313.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Griffin, Anthony Samuel. “Embedded microvascular networks for electronically reconfigurable materials.” 2015. Web. 17 Feb 2020.

Vancouver:

Griffin AS. Embedded microvascular networks for electronically reconfigurable materials. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2020 Feb 17]. Available from: http://hdl.handle.net/2142/88313.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Griffin AS. Embedded microvascular networks for electronically reconfigurable materials. [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/88313

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

28. Cheng, Shuo-peng. A Reconfigurable Multiband Monopole MIMO Antenna with Wideband Sensing Capability for Cognitive Radio.

Degree: Master, Electrical Engineering, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0712115-115640

► Recently, radio spectrum is in high demand as the usage of the spectrum increases day by day at an enormous rate; there is a need… (more)

▼ Recently, radio spectrum is in high demand as the usage of the spectrum increases day by day at an enormous rate; there is a need to find a solution to efficiently utilize these insufficient resources. Cognitive radio is a huge step towards this goal. Cognitive radio has become a promising technology thanks to its inherent spectrum sensing capability and frequency-agile radio functions for efficient spectrum utilization. In order to achieve a cognitive radio antenna system, we have to design a frequency reconfigurable antenna and a wideband sensing antenna. On the other hand, a multiple-input-multiple-output (MIMO) antenna system is a well-known technique to enhance the performance of wireless communication systems. Quite a few research has been available in each individual field but very few approaches are found in literature where both are combined and utilized. A cognitive radio MIMO antenna is presented in this paper. The proposed antenna consists of two reconfigurable printed monopole antennas and a coplanar waveguide (CPW) fed wideband sensing antenna located between the two antennas. The structure is specially designed for antenna miniature. For multi-channel wireless communication systems, it is essential that the designed multi-antenna would have high isolation between the antenna ports. To this end, the wideband antenna at the middle is utilized as a structure to enhance the isolation of two monopoles. When properly designed, the MIMO antenna can be electronically tuned over the lower ultrawideband (UWB) frequency band (2300â6300 MHz) using two pairs of varactor diodes. The wideband sensing antenna is used to cover a wide range frequency band from 2.2 GHz to more than 7 GHz. The proposed antenna elements develop a complete antenna platform for cognitive radio (CR) applications. The overall size of the antenna is set to be 60 Ã 40 mm2. Advisors/Committee Members: Hsing-Feng Chen (chair), Hsin-ÂLung Su (chair), Ken-Huang Lin (committee member), Yu-De Lin (chair), Chih-Wen Kuo (chair).

Subjects/Keywords: Cognitive radio communication system antenna; reconfigurable MIMO antenna; monopole antenna

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APA (6^th Edition):

Cheng, S. (2015). A Reconfigurable Multiband Monopole MIMO Antenna with Wideband Sensing Capability for Cognitive Radio. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0712115-115640

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cheng, Shuo-peng. “A Reconfigurable Multiband Monopole MIMO Antenna with Wideband Sensing Capability for Cognitive Radio.” 2015. Thesis, NSYSU. Accessed February 17, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0712115-115640.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cheng, Shuo-peng. “A Reconfigurable Multiband Monopole MIMO Antenna with Wideband Sensing Capability for Cognitive Radio.” 2015. Web. 17 Feb 2020.

Vancouver:

Cheng S. A Reconfigurable Multiband Monopole MIMO Antenna with Wideband Sensing Capability for Cognitive Radio. [Internet] [Thesis]. NSYSU; 2015. [cited 2020 Feb 17]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0712115-115640.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cheng S. A Reconfigurable Multiband Monopole MIMO Antenna with Wideband Sensing Capability for Cognitive Radio. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0712115-115640

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Chicago

29. Manoochehri, Omid. Wideband Reconfigurable Antenna Designs.

Degree: 2019, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/23642

► We propose to study wideband reconfigurable lens antennas because these antennas are used in two main types of applications: (1) automotive radar systems and (2)… (more)

▼ We propose to study wideband reconfigurable lens antennas because these antennas are used in two main types of applications: (1) automotive radar systems and (2) direction finding radar systems. These antennas should be low profile, wideband and have capability to handle high RF power. Most the radar systems do not have enough space for their antennas therefore the main challenge for antenna designers is proposing small antenna. These antennas can be used also for satellite communications where all above requirements are not easily achieved. Automotive radar systems typically operate in the microwave region or mm-wave region where lens structures are good candidates to be used for reconfigurable antennas. A good example is the Luneburg lens antenna. A Luneburg lens is fed by microstrip or horn antennas. The main challenge of Luneburg antennas are their size and fabrication process. Some authors proposed semi-spherical dielectric lens fed by microstrip antennas to reduce the size but microstrip antenna could not handle high power. Others used one-layer dielectric instead of multi dielectric layers to have easier fabrication process, but the total efficiency is not sufficient. We have addressed some of these challenges in our preliminary results: low profile, wide band, capability to handle high RF power and minimum difficulty to fabricate. We designed and fabricated an ultra-wideband multibeam microwave lens antenna operating from 8 GHz to 18 GHz to cover X and Ku band for radar systems. The antenna consists of four excitation ports connected to a parallel plate waveguide filled with a cylindrical dielectric slab. We simplified the fabrication process by proposing a material with a uniform dielectric constant whose value is optimized to maximize gain performance while simplifying manufacturing process, instead of having an index of refraction that varies with the radial distance from the axis of the cylindrical lens. We addressed the capability to handle high RF power and reducing size by replacing the antenna feed with coaxial connector pins to reduce the overall size and increase the bandwidth compared to prior designs. Many direction finding systems typically have 8 to10 antennas placed along a circle and another one, the reference antenna, placed at its center. When a wave from an unknown direction is incident on the system, its phase and amplitude are measured by all antennas along the circle and compared with the reference antenna to estimate the direction of arrival of the signal. The reference antenna is omnidirectional and should have low ripple pattern in all directions to minimize the estimation error. Biconical antennas are good candidates as reference antennas, but the main challenge is designing wideband biconical antenna to receive both vertical and horizontal polarizations, since the polarization of the incident signal is unknown. To address the lack of knowledge about the polarization of the incident signal, some authors proposed the use of polarizers to rotate the polarization of the incident wave.… Advisors/Committee Members: Erricolo, Danilo (advisor), Smida, Besma (committee member), Trivedi, Amit (committee member), Uslenghi, Piergiorgio L.E (committee member), Alexopoulos, Nicolaos G (committee member), Monticone, Francesco (committee member), Liang, Jing (committee member), Erricolo, Danilo (chair).

Subjects/Keywords: Reconfigurable antenna; UWB antenna; phase array antenna; direction finding

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APA (6^th Edition):

Manoochehri, O. (2019). Wideband Reconfigurable Antenna Designs. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/23642

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Manoochehri, Omid. “Wideband Reconfigurable Antenna Designs.” 2019. Thesis, University of Illinois – Chicago. Accessed February 17, 2020. http://hdl.handle.net/10027/23642.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Manoochehri, Omid. “Wideband Reconfigurable Antenna Designs.” 2019. Web. 17 Feb 2020.

Vancouver:

Manoochehri O. Wideband Reconfigurable Antenna Designs. [Internet] [Thesis]. University of Illinois – Chicago; 2019. [cited 2020 Feb 17]. Available from: http://hdl.handle.net/10027/23642.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Manoochehri O. Wideband Reconfigurable Antenna Designs. [Thesis]. University of Illinois – Chicago; 2019. Available from: http://hdl.handle.net/10027/23642

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

KTH

30. Magnusson, Patrick. Antenna for GNSS Reception in GEO-Orbit.

Degree: Space and Plasma Physics, 2014, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149283

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There are a number of global navigation satellite systems (GNSS), in use or planed, which are used for navigation on earth but also for… (more)

Subjects/Keywords: GNSS antenna; GNSS; GPS; antenna; GEO; helical antenna; circular array; conical

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Magnusson, P. (2014). Antenna for GNSS Reception in GEO-Orbit. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149283

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Magnusson, Patrick. “Antenna for GNSS Reception in GEO-Orbit.” 2014. Thesis, KTH. Accessed February 17, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149283.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Magnusson, Patrick. “Antenna for GNSS Reception in GEO-Orbit.” 2014. Web. 17 Feb 2020.

Vancouver:

Magnusson P. Antenna for GNSS Reception in GEO-Orbit. [Internet] [Thesis]. KTH; 2014. [cited 2020 Feb 17]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149283.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Magnusson P. Antenna for GNSS Reception in GEO-Orbit. [Thesis]. KTH; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149283

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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