subject:(microstrip antennas)

University of Alberta

1. Jhamb, Kashish. Integrated multi-band multi-polarized microstrip antenna designs.

Degree: MS, Department of Electrical and Computer Engineering, 2011, University of Alberta

URL: https://era.library.ualberta.ca/files/2n49t3098

► Recently, antenna designs with multi-frequency operation and multi-polarization characteristics are in great demand for future wireless systems. In the thesis, several integrated microstrip antenna designs… (more)

Subjects/Keywords: Microstrip Antennas

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Jhamb, K. (2011). Integrated multi-band multi-polarized microstrip antenna designs. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/2n49t3098

Chicago Manual of Style (16^th Edition):

Jhamb, Kashish. “Integrated multi-band multi-polarized microstrip antenna designs.” 2011. Masters Thesis, University of Alberta. Accessed January 23, 2021. https://era.library.ualberta.ca/files/2n49t3098.

MLA Handbook (7^th Edition):

Jhamb, Kashish. “Integrated multi-band multi-polarized microstrip antenna designs.” 2011. Web. 23 Jan 2021.

Vancouver:

Jhamb K. Integrated multi-band multi-polarized microstrip antenna designs. [Internet] [Masters thesis]. University of Alberta; 2011. [cited 2021 Jan 23]. Available from: https://era.library.ualberta.ca/files/2n49t3098.

Council of Science Editors:

Jhamb K. Integrated multi-band multi-polarized microstrip antenna designs. [Masters Thesis]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/2n49t3098

University of Manitoba

2. Juyal, Prateek. Directive microstrip disc radiators based on TM1m modes.

Degree: Electrical and Computer Engineering, 2016, University of Manitoba

URL: http://hdl.handle.net/1993/32074

► Fundamental TM11 mode of circular microstrip antennas has a limitation of low broadside gain. This thesis explores and investigates the possibility of designing high gain… (more)

▼ Fundamental TM11 mode of circular microstrip antennas has a limitation of low broadside gain. This thesis explores and investigates the possibility of designing high gain circular microstrip antennas by using higher zeros of the first order mode, or the TM1m modes. Deficiencies in the existing methods of gain enhancement, motivates the need to look for new methods. This is done by first investigating the radiation characteristics of TM1m modes, and then providing techniques for sidelobe suppression in their radiation patterns. Several approaches are proposed and corresponding to each developed technique, an example of high gain antenna is designed, fabricated and experimentally evaluated. First, through the radiation characteristics of a magnetic loop over an infinite ground plane, we explain the occurrence of high sidelobes in the E-plane radiation patterns of the TM1m modes. By noting the peak directivity and sidelobe variation with loop size, we propose, investigate and demonstrate the use of high permittivity substrates to reduce the sidelobes in the TM12 mode. Second, to remove the dependence of the radiation characteristics on high permittivity substrates, another technique to suppress the high sidelobes of TM12 mode, is presented. It is found that introducing a narrow nonresonant rectangular slot at the patch center, sidelobes of the TM12 mode can be effectively suppressed. Sidelobe level (SLL) suppression is demonstrated by both simulation and measurement, using various configurations. Third, it is proposed that linearly superimposing the radiation fields of either odd or even zeros of the first order mode, can achieve both high gain and low sidelobes. To show this, stacked antenna configurations of TM11 and TM13 modes are thoroughly investigated and SLL suppression is demonstrated. Finally, to leverage further advantage of the linear superposition of modes, a single layer annular slot loaded antenna configuration is proposed. The proposed new configurations are based on higher order TM1m modes, which, for excitation, requires electrically large conducting discs. This property offers one more advantage at high frequencies, where antenna size becomes too small for the fundamental mode to fabricate and feed. The proposed electrically large antennas eliminate these problems, and become more practical to fabricate. Advisors/Committee Members: Shafai, Lotfollah (Electrical and Computer Engineering) (supervisor), Mojabi, Puyan (Electrical and Computer Engineering) Pistorius, Stephen (Physics and Astronomy), Eleftheriades, George (Electrical and Computer Engineering, University of Toronto) (examiningcommittee).

Subjects/Keywords: Antennas; Directivity; Microstrip

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Juyal, P. (2016). Directive microstrip disc radiators based on TM1m modes. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/32074

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):

Juyal, Prateek. “Directive microstrip disc radiators based on TM1m modes.” 2016. Thesis, University of Manitoba. Accessed January 23, 2021. http://hdl.handle.net/1993/32074.

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

MLA Handbook (7^th Edition):

Juyal, Prateek. “Directive microstrip disc radiators based on TM1m modes.” 2016. Web. 23 Jan 2021.

Vancouver:

Juyal P. Directive microstrip disc radiators based on TM1m modes. [Internet] [Thesis]. University of Manitoba; 2016. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1993/32074.

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

Council of Science Editors:

Juyal P. Directive microstrip disc radiators based on TM1m modes. [Thesis]. University of Manitoba; 2016. Available from: http://hdl.handle.net/1993/32074

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

University of Missouri – Columbia

3. Alwan, Younes S. Design and analysis of super wideband microstrip antennas for parameter optimization.

Degree: 2016, University of Missouri – Columbia

URL: https://doi.org/10.32469/10355/56405

► [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this work, two super wideband microstrip antennas have been proposed, studied, and analyzed… (more)

Subjects/Keywords: Microstrip antennas – Design

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Alwan, Y. S. (2016). Design and analysis of super wideband microstrip antennas for parameter optimization. (Thesis). University of Missouri – Columbia. Retrieved from https://doi.org/10.32469/10355/56405

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):

Alwan, Younes S. “Design and analysis of super wideband microstrip antennas for parameter optimization.” 2016. Thesis, University of Missouri – Columbia. Accessed January 23, 2021. https://doi.org/10.32469/10355/56405.

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

MLA Handbook (7^th Edition):

Alwan, Younes S. “Design and analysis of super wideband microstrip antennas for parameter optimization.” 2016. Web. 23 Jan 2021.

Vancouver:

Alwan YS. Design and analysis of super wideband microstrip antennas for parameter optimization. [Internet] [Thesis]. University of Missouri – Columbia; 2016. [cited 2021 Jan 23]. Available from: https://doi.org/10.32469/10355/56405.

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

Council of Science Editors:

Alwan YS. Design and analysis of super wideband microstrip antennas for parameter optimization. [Thesis]. University of Missouri – Columbia; 2016. Available from: https://doi.org/10.32469/10355/56405

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

4. Sarin, V.P. Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas.

Degree: 2012, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/5123

► With the recent progress and rapid increase in mobile terminals, the design of antennas for small mobile terminals is acquiring great importance. In view of… (more)

Subjects/Keywords: Antennas; Microstrip antennas; Fabrication of microstrip antennas; 3D Electromagnetic simulator

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Sarin, V. P. (2012). Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/5123

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):

Sarin, V P. “Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas.” 2012. Thesis, Cochin University of Science and Technology. Accessed January 23, 2021. http://dyuthi.cusat.ac.in/purl/5123.

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

MLA Handbook (7^th Edition):

Sarin, V P. “Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas.” 2012. Web. 23 Jan 2021.

Vancouver:

Sarin VP. Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas. [Internet] [Thesis]. Cochin University of Science and Technology; 2012. [cited 2021 Jan 23]. Available from: http://dyuthi.cusat.ac.in/purl/5123.

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

Council of Science Editors:

Sarin VP. Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas. [Thesis]. Cochin University of Science and Technology; 2012. Available from: http://dyuthi.cusat.ac.in/purl/5123

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

Anna University

5. Selvarani M. Enhancing the bandwidth of rectangular microstrip antennas through design optimization of feeding methods;.

Degree: 2013, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/13662

►

Antenna is one of the most critical component for wireless communication systems. The antenna must also be adaptive to act as a directional device to… (more)

▼

Antenna is one of the most critical component for wireless communication systems. The antenna must also be adaptive to act as a directional device to optimize or accentuate the transmitted or received energy in some directions while suppressing it in others. A good design of the antenna can be very useful in improving the overall system performance. Microstrip antennas have many attractive features which has considerable attention for wireless communication applications. Researchers are engaged in removing this limitation and many techniques have been proposed for the design of wideband antennas for wireless communication systems. Methods for increasing the bandwidth of microstrip antenna are continuously getting upgraded. Undoubtedly the simplest microstrip antenna configuration is rectangular microstrip parch antenna. Hence this investigation deals with rectangular microstrip antenna. The prototype antenna 2 demonstrates that a broadband rectangular microstrip patch antenna with narrow slots and parasitic element. This antenna is excited by an L-probe fed. The bandwidth is improved by two parallel narrow slots on the main patch and parasitic patch. The design provides a simulated impedance bandwidth of 71.33% with gain of 8.6dbi. It has been observed that additional gap-coupled parasitic element yields considerably wider impedance bandwidth. This antenna configuration can be used in applications where wider impedance bandwidths are needed and variations in the radiation pattern are tolerated. The main patch is excited by proximity coupling. This antenna provides a dual frequency response with the simulated impedance bandwidth of 63.35% and 33.48% with a gain of 6 dBi. The design demonstrates that all the three antennas overcome the inherent narrow bandwidth of the conventional microstrip antenna. The main advantages of these antennas are their improved bandwidth with the acceptable performance of low return loss, good gain and radiation characteristics. newline newline newline

Appendix 1; pp. 95-144

Advisors/Committee Members: Gunasekaran, N..

Subjects/Keywords: Microstrip Antennas; feeding methods; bandwidth

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

M, S. (2013). Enhancing the bandwidth of rectangular microstrip antennas through design optimization of feeding methods;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/13662

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):

M, Selvarani. “Enhancing the bandwidth of rectangular microstrip antennas through design optimization of feeding methods;.” 2013. Thesis, Anna University. Accessed January 23, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/13662.

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

MLA Handbook (7^th Edition):

M, Selvarani. “Enhancing the bandwidth of rectangular microstrip antennas through design optimization of feeding methods;.” 2013. Web. 23 Jan 2021.

Vancouver:

M S. Enhancing the bandwidth of rectangular microstrip antennas through design optimization of feeding methods;. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Jan 23]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/13662.

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

Council of Science Editors:

M S. Enhancing the bandwidth of rectangular microstrip antennas through design optimization of feeding methods;. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/13662

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

Macquarie University

6. Majumdar, Budhaditya. Transmission-line modelling of microstrip antennas and their application in fixed-frequency beam steering.

Degree: 2017, Macquarie University

URL: http://hdl.handle.net/1959.14/1261376

►

Empirical thesis.

Bibliography: pages 181-199.

1 Introduction – 2 Reconfigurable antennas: Background – 3 Rectangular microstrip antennas: A transmission-line approach – 4 Arbitrary position of… (more)

▼

Empirical thesis.

Bibliography: pages 181-199.

1 Introduction – 2 Reconfigurable antennas: Background – 3 Rectangular microstrip antennas: A transmission-line approach – 4 Arbitrary position of a shorting post: Modelling and effects – 5 Active rectangular microstrip antenna: Limitations of the model – 6 Active antenna beam steering: Voltage controlled scanning - 7 New reconfigurable meta-surfaces: Transmission-line modelling – 8 Periodic 3D array of square plates: EM energy transport – 9 Fixed-frequency broadside-endfire scanning: A new antenna – Conclusions and future work.

Planar antennas are paramount in today's world because they can be embedded easily into portable devices such as laptops, mobile phones, etc. Beam or the radiation with directivity is important beacause it gives a suitable range advantage than omnidirectionally radiating antennas with the same power. Steerability can provide the flexibility of the omnidirectional antenna and the benefit of a directional antenna; provided that multiplexing is possible. Reconfigurable antennas that can radiate multiple patterns at a single frequency or a single spectrum are necessary for modern telecommunication systems. The requirements for increased functionalities like direction finding, beam steering, radar, control and command, within a confined volume place a greater burden on today's transmitting and receiving systems. Reconfigurable antennas offer an exceptional solution to this complex engineering problem.

This thesis contains the design of two particular fixed frequency beam-steerable antennas. The antennas are cost effective from the industrial perspective, and reliable for long term maintenance free use. The first one is a fixed frequency active phased array antenna. The relevant chapter showcases the layouts and results for two 1 x 2 variants and one 2 x 2 variant. Initial development of accurate transmission line models gave the insight of developing a fixed frequency active phased array antenna. Initial chapters outline the transmission-line modelling of single tunable and reconfigurable rectangular microstrip antenna elements. Analytically obtained values reasonably agree with the results achieved from measurements and simultaions, for numerous designs based on multiple substrates. The active phased array antenna can steer its beam up to 25°.

The limitations of the phased array antennas led to the design of the second fixed frequency beam-steerable antenna. The second beanm-steerable relies on a switchable ground plane that can reflect or transmit electromagnetic waves. The second antenna has a steerable beam that radiates either in the broadside or endfire region. The antenna can cove up to 133° in the H-plane. Later chapters in this thesis discuss the transmission-line modelling of the reconfigurable surface with numerous examples, and its operation as a surface waveguide. The examples for the transmission-line model demonstrate reasonable agreement with simulation results for different substrate thickness and with or…

Advisors/Committee Members: Macquarie University. Department of Engineering.

Subjects/Keywords: Microstrip antennas – Design and construction

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Majumdar, B. (2017). Transmission-line modelling of microstrip antennas and their application in fixed-frequency beam steering. (Doctoral Dissertation). Macquarie University. Retrieved from http://hdl.handle.net/1959.14/1261376

Chicago Manual of Style (16^th Edition):

Majumdar, Budhaditya. “Transmission-line modelling of microstrip antennas and their application in fixed-frequency beam steering.” 2017. Doctoral Dissertation, Macquarie University. Accessed January 23, 2021. http://hdl.handle.net/1959.14/1261376.

MLA Handbook (7^th Edition):

Majumdar, Budhaditya. “Transmission-line modelling of microstrip antennas and their application in fixed-frequency beam steering.” 2017. Web. 23 Jan 2021.

Vancouver:

Majumdar B. Transmission-line modelling of microstrip antennas and their application in fixed-frequency beam steering. [Internet] [Doctoral dissertation]. Macquarie University; 2017. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1959.14/1261376.

Council of Science Editors:

Majumdar B. Transmission-line modelling of microstrip antennas and their application in fixed-frequency beam steering. [Doctoral Dissertation]. Macquarie University; 2017. Available from: http://hdl.handle.net/1959.14/1261376

7. Nishamol, M S. Design and Development of re configurable compact cross patch antenna for switchable polarization.

Degree: Electronics, 2012, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/3085

►

Antennas are necessary and vital components of communication and radar systems, but sometimes their inability to adjust to new operating scenarios can limit system performance.… (more)

Subjects/Keywords: Microstrip antennas; Various Microstrip antennas; Feeding Techniques; Reconfigurable antennas; Dual- frequency microstrip antennas; Antenna measurement facilities

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Nishamol, M. S. (2012). Design and Development of re configurable compact cross patch antenna for switchable polarization. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/3085

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):

Nishamol, M S. “Design and Development of re configurable compact cross patch antenna for switchable polarization.” 2012. Thesis, Cochin University of Science and Technology. Accessed January 23, 2021. http://dyuthi.cusat.ac.in/purl/3085.

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

MLA Handbook (7^th Edition):

Nishamol, M S. “Design and Development of re configurable compact cross patch antenna for switchable polarization.” 2012. Web. 23 Jan 2021.

Vancouver:

Nishamol MS. Design and Development of re configurable compact cross patch antenna for switchable polarization. [Internet] [Thesis]. Cochin University of Science and Technology; 2012. [cited 2021 Jan 23]. Available from: http://dyuthi.cusat.ac.in/purl/3085.

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

Council of Science Editors:

Nishamol MS. Design and Development of re configurable compact cross patch antenna for switchable polarization. [Thesis]. Cochin University of Science and Technology; 2012. Available from: http://dyuthi.cusat.ac.in/purl/3085

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

University of Adelaide

8. Verma, Akhilesh. Design and development of microwave patch antennas using conductive polymers.

Degree: 2012, University of Adelaide

URL: http://hdl.handle.net/2440/95876

► Recent advances in the electrical conductivity levels of Conducting Polymers (CP) and impressive improvements in their stability are making these materials very attractive potential alternatives… (more)

▼ Recent advances in the electrical conductivity levels of Conducting Polymers (CP) and impressive improvements in their stability are making these materials very attractive potential alternatives to copper in planar antennas. This is particularly so in applications where light weight, inexpensive and/or wearable/conformal antennas are a consideration. There have been isolated efforts in the past towards using CP as material for antenna and transmission line design. This thesis endeavours to provide a systematic study of key factors that are important for the understanding of these materials, their design and simulation as basis material for building microwave antennas. The thesis could be considered as made up of two parts. The first part (Chapter 2 and Appendix A) presents a mathematical model of electrical conduction and permittivity in CPs as a function of dopant concentration and frequency. The electrical conduction and permittivity are very dispersive for these materials primarily due to different relaxation times exhibited by the conduction electrons. This part also develops closed-form expressions formulas for rapid estimation of the effective permittivity of microstrip lines on multi-layer substrates. A 2D finite element eigen-mode analysis leading to the effective permittivity for two and three layer microstrip line structures is used as a reference solution and successfully validates the closed-form expressions. The second part (Chapter 3 and 4) presents the design, simulation and fabrication of microwave antennas using thin CP films. Results on CP based microstrip patch antennas operating at 2 GHz, 4.5 GHz and 6 GHz are presented. This part also presents a systematic study on the impact of CP film thickness, conductivity and fabrication method on antenna performance. An indirect method for determination of the permittivity of non-standard RF substrates and detection of dispersion in the electrical conductivity of CP film has been demonstrated. This part validates the possibility of using CPs as microwave antennas and gives credence to many possibilities in the field of conformal antennas, wearable antennas, sports and medical applications. The thesis is concluded in chapter 5 by summarising the results and presenting some exciting possibilities that these exotic materials open for future applications in the field of antenna applications. Advisors/Committee Members: Bates, Bevan Douglas (advisor), Powis, Leigh (advisor), Fumeaux, Christophe (advisor), School of Electrical and Electronic Engineering (school).

Subjects/Keywords: microstrip patch antennas; patch antennas; conducting polymer antennas; microwave patch antennas; thin film antennas

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Verma, A. (2012). Design and development of microwave patch antennas using conductive polymers. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/95876

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):

Verma, Akhilesh. “Design and development of microwave patch antennas using conductive polymers.” 2012. Thesis, University of Adelaide. Accessed January 23, 2021. http://hdl.handle.net/2440/95876.

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

MLA Handbook (7^th Edition):

Verma, Akhilesh. “Design and development of microwave patch antennas using conductive polymers.” 2012. Web. 23 Jan 2021.

Vancouver:

Verma A. Design and development of microwave patch antennas using conductive polymers. [Internet] [Thesis]. University of Adelaide; 2012. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/2440/95876.

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

Council of Science Editors:

Verma A. Design and development of microwave patch antennas using conductive polymers. [Thesis]. University of Adelaide; 2012. Available from: http://hdl.handle.net/2440/95876

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

9. Hamidouche, Louiza. Contribution to the analysis of microstrip antennas with defects.

Degree: 2013, Université M'Hamed Bougara Boumerdès

URL: http://dlibrary.univ-boumerdes.dz:8080123456789/1508

►

61 p. : ill. ; 30 cm

In this project a new shape of DMS is proposed and applied for an antenna designed to radiate… (more)

Subjects/Keywords: Rayonnements; Radiation; Microstrip antennas; Antennes microrubans

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Hamidouche, L. (2013). Contribution to the analysis of microstrip antennas with defects. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080123456789/1508

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):

Hamidouche, Louiza. “Contribution to the analysis of microstrip antennas with defects.” 2013. Thesis, Université M'Hamed Bougara Boumerdès. Accessed January 23, 2021. http://dlibrary.univ-boumerdes.dz:8080123456789/1508.

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

MLA Handbook (7^th Edition):

Hamidouche, Louiza. “Contribution to the analysis of microstrip antennas with defects.” 2013. Web. 23 Jan 2021.

Vancouver:

Hamidouche L. Contribution to the analysis of microstrip antennas with defects. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2013. [cited 2021 Jan 23]. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1508.

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

Council of Science Editors:

Hamidouche L. Contribution to the analysis of microstrip antennas with defects. [Thesis]. Université M'Hamed Bougara Boumerdès; 2013. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1508

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

10. Lethakumary,B. DEVELOPMENT AND ANLAYSIS OF BROADBAND L·STRIP FED MICROSTRIP ANTENNAS.

Degree: 2004, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/2116

►

The thesis is the outcome of the experimental and theoretical Investigations on novel feeding techniques for bandwidth enhancement of microstrip patches. The new feeding techniques… (more)

Subjects/Keywords: Microstrip Antennas; Microstrip patch antennas; 8roadband microstrip antennas; L-Strip Fed Microstrip Antennas

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Lethakumary,B. (2004). DEVELOPMENT AND ANLAYSIS OF BROADBAND L·STRIP FED MICROSTRIP ANTENNAS. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/2116

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

Chicago Manual of Style (16^th Edition):

Lethakumary,B. “DEVELOPMENT AND ANLAYSIS OF BROADBAND L·STRIP FED MICROSTRIP ANTENNAS.” 2004. Thesis, Cochin University of Science and Technology. Accessed January 23, 2021. http://dyuthi.cusat.ac.in/purl/2116.

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

MLA Handbook (7^th Edition):

Lethakumary,B. “DEVELOPMENT AND ANLAYSIS OF BROADBAND L·STRIP FED MICROSTRIP ANTENNAS.” 2004. Web. 23 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Lethakumary,B. DEVELOPMENT AND ANLAYSIS OF BROADBAND L·STRIP FED MICROSTRIP ANTENNAS. [Internet] [Thesis]. Cochin University of Science and Technology; 2004. [cited 2021 Jan 23]. Available from: http://dyuthi.cusat.ac.in/purl/2116.

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

Council of Science Editors:

Lethakumary,B. DEVELOPMENT AND ANLAYSIS OF BROADBAND L·STRIP FED MICROSTRIP ANTENNAS. [Thesis]. Cochin University of Science and Technology; 2004. Available from: http://dyuthi.cusat.ac.in/purl/2116

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

Anna University

11. Kumar K. Performance evaluation of a class of Microstrip antennas;.

Degree: Performance evaluation of a class of Microstrip antennas, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/49442

►

Wireless communication technology growing faster and faster newlinehence so much demands are there to get wide bandwidth Smaller size and newlinehigher impedance bandwidth antennas are… (more)

Subjects/Keywords: antennas; Information and communication engineering; Microstrip

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

K, K. (2015). Performance evaluation of a class of Microstrip antennas;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/49442

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):

K, Kumar. “Performance evaluation of a class of Microstrip antennas;.” 2015. Thesis, Anna University. Accessed January 23, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/49442.

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

MLA Handbook (7^th Edition):

K, Kumar. “Performance evaluation of a class of Microstrip antennas;.” 2015. Web. 23 Jan 2021.

Vancouver:

K K. Performance evaluation of a class of Microstrip antennas;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Jan 23]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/49442.

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

Council of Science Editors:

K K. Performance evaluation of a class of Microstrip antennas;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/49442

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

12. Hamidouche, Louiza. Contribution to the analysis of microstrip antennas with defects.

Degree: 2013, Université M'Hamed Bougara Boumerdès

URL: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1310

►

61 p. : ill. ; 30 cm

In this project a new shape of DMS is proposed and applied for an antenna designed to radiate… (more)

Subjects/Keywords: Rayonnements; Radiation; Microstrip antennas; Antennes microrubans

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Hamidouche, L. (2013). Contribution to the analysis of microstrip antennas with defects. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1310

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):

Hamidouche, Louiza. “Contribution to the analysis of microstrip antennas with defects.” 2013. Thesis, Université M'Hamed Bougara Boumerdès. Accessed January 23, 2021. http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1310.

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

MLA Handbook (7^th Edition):

Hamidouche, Louiza. “Contribution to the analysis of microstrip antennas with defects.” 2013. Web. 23 Jan 2021.

Vancouver:

Hamidouche L. Contribution to the analysis of microstrip antennas with defects. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2013. [cited 2021 Jan 23]. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1310.

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

Council of Science Editors:

Hamidouche L. Contribution to the analysis of microstrip antennas with defects. [Thesis]. Université M'Hamed Bougara Boumerdès; 2013. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1310

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

13. Dakhli, Saber. Augmentation de la performance des antennes miniatures inspirées par métamatériaux : conception d'antennes, inspirée par métamatériaux : Design of printed microstrip antennas inspired from metamaterials.

Degree: Docteur es, Electronique, 2015, Rennes 1; Université de Tunis‎. Faculté des sciences de Tunis

URL: http://www.theses.fr/2015REN1S029

►

Le travail de cette thèse concerne la conception de nouvelles architectures d'antennes miniatures ou multifréquences en utilisant la technique inspirée des métamatériaux. Les antennes proposées… (more)

Subjects/Keywords: Antennes miniatures; Métamatériaux; Microstrip antennas; Metamaterials

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Dakhli, S. (2015). Augmentation de la performance des antennes miniatures inspirées par métamatériaux : conception d'antennes, inspirée par métamatériaux : Design of printed microstrip antennas inspired from metamaterials. (Doctoral Dissertation). Rennes 1; Université de Tunis‎. Faculté des sciences de Tunis. Retrieved from http://www.theses.fr/2015REN1S029

Chicago Manual of Style (16^th Edition):

Dakhli, Saber. “Augmentation de la performance des antennes miniatures inspirées par métamatériaux : conception d'antennes, inspirée par métamatériaux : Design of printed microstrip antennas inspired from metamaterials.” 2015. Doctoral Dissertation, Rennes 1; Université de Tunis‎. Faculté des sciences de Tunis. Accessed January 23, 2021. http://www.theses.fr/2015REN1S029.

MLA Handbook (7^th Edition):

Dakhli, Saber. “Augmentation de la performance des antennes miniatures inspirées par métamatériaux : conception d'antennes, inspirée par métamatériaux : Design of printed microstrip antennas inspired from metamaterials.” 2015. Web. 23 Jan 2021.

Vancouver:

Dakhli S. Augmentation de la performance des antennes miniatures inspirées par métamatériaux : conception d'antennes, inspirée par métamatériaux : Design of printed microstrip antennas inspired from metamaterials. [Internet] [Doctoral dissertation]. Rennes 1; Université de Tunis‎. Faculté des sciences de Tunis; 2015. [cited 2021 Jan 23]. Available from: http://www.theses.fr/2015REN1S029.

Council of Science Editors:

Dakhli S. Augmentation de la performance des antennes miniatures inspirées par métamatériaux : conception d'antennes, inspirée par métamatériaux : Design of printed microstrip antennas inspired from metamaterials. [Doctoral Dissertation]. Rennes 1; Université de Tunis‎. Faculté des sciences de Tunis; 2015. Available from: http://www.theses.fr/2015REN1S029

Brunel University

14. Thuwaini, Alaa H. Radhi. Mutual coupling suppression in multiple microstrip antennas for wireless applications.

Degree: PhD, 2018, Brunel University

URL: http://bura.brunel.ac.uk/handle/2438/17310 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765075

► Mutual Coupling (MC) is the exchange of energy between multiple antennas when placed on the same PCB, it being one of the critical parameters and… (more)

▼ Mutual Coupling (MC) is the exchange of energy between multiple antennas when placed on the same PCB, it being one of the critical parameters and a significant issue to be considered when designing MIMO antennas. It appears significantly where multiple antennas are placed very close to each other, with a high coupling affecting the performance of the array, in terms radiation patterns, the reflection coefficient, and influencing the input impedance. Moreover; it degrades the designed efficiency and gain since part of the power that could have been radiated becomes absorbed by other adjacent antennas' elements. The coupling mechanism between multiple antenna elements is identified as being mainly through three different paths or channels: surface wave propagation, space (direct) radiation and reactive near-field coupling. In this thesis, various coupling reduction approaches that are commonly employed in the literature are categorised based on these mechanisms. Furthermore, a new comparative study involving four different array types (PIFA, patch, monopole, and slot), is explained in detail. This thesis primarily focuses on three interconnected research topics for mutual coupling reduction based on new isolation approaches for different wireless applications (i.e. Narrowband, Ultra-wide-band and Multi-band). First, a new Fractal based Electromagnetic Band Gap (FEBG) decoupling structure between PIFAs is proposed and investigated for a narrowband application. Excellent isolation of more than 27 dB (Z-X plane) and 40 dB (Z-Y plane) is obtained without much degradation of the radiation characteristics. It is found that the fractal structures can provide a band-stop effect, because of their self-similarity features for a particular frequency band. Second, new UWB-MIMO antennas are presented with high isolation characteristics. Wideband isolation (≥ 31 dB) is achieved through the entire UWB band (3.1-10.6 GHz) by etching a novel compact planar decoupling structure inserted between these multiple UWB antennas. Finally, new planar MIMO antennas are presented for multi-band (quad bands) applications. A significant isolation improvement over the reference (≥ 17 dB) is achieved in each band by etching a hybrid solution. All the designs reported in this thesis have been fabricated and measured, with the simulated and measured results agreeing well in most cases.

Subjects/Keywords: Mutual coupling; Antennas; Isolations; Wireless applications; Microstrip

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Thuwaini, A. H. R. (2018). Mutual coupling suppression in multiple microstrip antennas for wireless applications. (Doctoral Dissertation). Brunel University. Retrieved from http://bura.brunel.ac.uk/handle/2438/17310 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765075

Chicago Manual of Style (16^th Edition):

Thuwaini, Alaa H Radhi. “Mutual coupling suppression in multiple microstrip antennas for wireless applications.” 2018. Doctoral Dissertation, Brunel University. Accessed January 23, 2021. http://bura.brunel.ac.uk/handle/2438/17310 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765075.

MLA Handbook (7^th Edition):

Thuwaini, Alaa H Radhi. “Mutual coupling suppression in multiple microstrip antennas for wireless applications.” 2018. Web. 23 Jan 2021.

Vancouver:

Thuwaini AHR. Mutual coupling suppression in multiple microstrip antennas for wireless applications. [Internet] [Doctoral dissertation]. Brunel University; 2018. [cited 2021 Jan 23]. Available from: http://bura.brunel.ac.uk/handle/2438/17310 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765075.

Council of Science Editors:

Thuwaini AHR. Mutual coupling suppression in multiple microstrip antennas for wireless applications. [Doctoral Dissertation]. Brunel University; 2018. Available from: http://bura.brunel.ac.uk/handle/2438/17310 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765075

University of KwaZulu-Natal

15. Motsa, Sibusiso Thabiso. Enhanced spectral efficiency schemes for space-time block coded spatial modulation.

Degree: 2019, University of KwaZulu-Natal

URL: https://researchspace.ukzn.ac.za/handle/10413/18838

► The ever-growing demand for high data rate, low latency and energy efficient transmission schemes has seen an increasing popularity of multiple-input multiple-output (MIMO) scheme. One… (more)

▼ The ever-growing demand for high data rate, low latency and energy efficient transmission schemes has seen an increasing popularity of multiple-input multiple-output (MIMO) scheme. One such scheme is the orthogonal space-time block code (STBC) scheme introduced by Alamouti which provides full diversity without sacrificing its data rate. Introduction of spatial multiplexing to STBC through spatial modulation (SM) improves the performance and spectral efficiency whilst eliminating transmit antenna synchronization and inter-channel interference (ICI) at the receiver. In this dissertation, we investigate and evaluate the error performance of both STBC and SM MIMO schemes. As such, we exploit the advantage of both schemes in space-time block coded spatial modulation (STBC-SM) scheme resulting in a high spectral efficient scheme. Motivated by the requisite for higher data rate transmission schemes, we expand the orthogonal STBC transmission matrix to further improve the spectral efficiency of space-time block coded spatial modulation. The fundamental idea is keeping the size of the amplitude/phase modulator (APM) symbol set of STBC the same. Therefore, unitary matrix transformation technique is introduced to the conventional STBC matrix. This technique prevents an increase in the peak-to-average power ratio of the transmitted symbols. A decrease in the phase angle of the unitary matrix yields an increase in the number of information bits transmitted, subsequently increasing the spectral efficiency of a system. A new system referred to as enhanced spectral efficiency space-time block coded spatial modulation (E-STBC-SM) is proposed. Moreover, a tight closed-form lower-bound is derived to estimate the average BER of the E-STBC-SM system over Rayleigh frequency-flat fading channel and validated with Monte Carlo simulations. Comparisons of the proposed E-STBC-SM scheme and conventional STBC-SM scheme are carried out with four receive antennas in all cases. The E-STBC-SM scheme virtually retains the BER performance of the STBC-SM scheme with a maximum attenuation of 0.6 dB throughout modulation order 16, 32 and 64 of a PSK modulator. An increase of between 2 to 5 information bits are obtained across the motioned modulation orders through altering of the phase angle of the unitary matrix transform incorporated with the conventional STBC-SM scheme thus improving the spectral efficiency. In a rare occurrence of 𝑀=32 and 𝜃=𝜋2 configured E-STBC-SM scheme, an improvement of 0.2 dB in error performance was experienced. Advisors/Committee Members: Xu, Hongjun. (advisor).

Subjects/Keywords: Wireless communication.; Microstrip antennas.; Microwave studio.; Polarization.

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Motsa, S. T. (2019). Enhanced spectral efficiency schemes for space-time block coded spatial modulation. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/18838

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):

Motsa, Sibusiso Thabiso. “Enhanced spectral efficiency schemes for space-time block coded spatial modulation.” 2019. Thesis, University of KwaZulu-Natal. Accessed January 23, 2021. https://researchspace.ukzn.ac.za/handle/10413/18838.

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

MLA Handbook (7^th Edition):

Motsa, Sibusiso Thabiso. “Enhanced spectral efficiency schemes for space-time block coded spatial modulation.” 2019. Web. 23 Jan 2021.

Vancouver:

Motsa ST. Enhanced spectral efficiency schemes for space-time block coded spatial modulation. [Internet] [Thesis]. University of KwaZulu-Natal; 2019. [cited 2021 Jan 23]. Available from: https://researchspace.ukzn.ac.za/handle/10413/18838.

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

Council of Science Editors:

Motsa ST. Enhanced spectral efficiency schemes for space-time block coded spatial modulation. [Thesis]. University of KwaZulu-Natal; 2019. Available from: https://researchspace.ukzn.ac.za/handle/10413/18838

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

Macquarie University

16. Sun, Zhu. Multi-band dual-polarized shared aperture microstrip phased array.

Degree: 2014, Macquarie University

URL: http://hdl.handle.net/1959.14/1127709

►

Empirical thesis.

Bibliography: pages 185-202.

Chapter 1. Introduction – Chapter 2. Literature review – Chapter 3. Improved S/X DBDP-SA microstrip array – Chapter 4. L/S/X… (more)

▼

Empirical thesis.

Bibliography: pages 185-202.

Chapter 1. Introduction – Chapter 2. Literature review – Chapter 3. Improved S/X DBDP-SA microstrip array – Chapter 4. L/S/X tri-band dual-polarized microstrip array – Chapter 5. L/C DBDP-SA sandwiched stacked-patch array – Chapter 6. Conclusion and future research.

Multi-band systems are becoming increasingly popular in both military and civil applications such as tactical radar systems and synthetic aperture radar (SAR) systems because their information capacity is significantly higher than single-band counterparts. As the interface between free space and an internal wave guide, a multi-band antenna plays an important role in such systems.

A multi-band dual-polarized (MBDP) antenna array can be realized by simply positioning several single-band antenna arrays side-by-side. However, this approach is not desirable because it significantly increases the aperture size and antenna weight. The MBDP shared aperture antenna arrays studied in this thesis can minimize the array size and weight by sharing the aperture of each band. Therefore, it is attractive for some compact systems like space-borne SAR antennas and vehicle based tactical radars.

In this thesis, several contributions are made to the knowledge in MBDP shared aperture arrays. They are listed below.

1) Performance improving methods are presented for dual-band dual-polarized shared aperture (DBDP-SA) array. The inter-polarization isolation of the array was improved and the lower-band bandwidth was enhanced for a given antenna thickness. A prototype S/XDBDP-SA microstrip array has been designed and fabricated to verify these methods. Fractional frequency ratio is also achieved in a prototype array by adopting an interleaved dual band embedding structure.

2) A multi-band dual-polarized shared aperture (MBDP-SA) array design method is proposed for SAR applications. To verify the feasibility of this method, an L/S/X tri-band dual-polarized shared aperture (TBDP-SA) array has been designed and fabricated. Good performance has been achieved in all three bands.

3) A novel sandwiched stacked-patch DBDP array is presented, with an aim to enhance the bandwidth in the lower band. Dual band embedding methods are also studied and compared in terms of their bandwidth performance. An L/C DBDP-SA sandwiched stacked patch array has been designed and fabricated to validate this new concept.

1 online resource (xx, 202 pages) illustrations (some colour)

Advisors/Committee Members: Macquarie University. Department of Engineering.

Subjects/Keywords: Microstrip antennas – Design and construction; multi-band; shared aperture; microstrip array

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Sun, Z. (2014). Multi-band dual-polarized shared aperture microstrip phased array. (Doctoral Dissertation). Macquarie University. Retrieved from http://hdl.handle.net/1959.14/1127709

Chicago Manual of Style (16^th Edition):

Sun, Zhu. “Multi-band dual-polarized shared aperture microstrip phased array.” 2014. Doctoral Dissertation, Macquarie University. Accessed January 23, 2021. http://hdl.handle.net/1959.14/1127709.

MLA Handbook (7^th Edition):

Sun, Zhu. “Multi-band dual-polarized shared aperture microstrip phased array.” 2014. Web. 23 Jan 2021.

Vancouver:

Sun Z. Multi-band dual-polarized shared aperture microstrip phased array. [Internet] [Doctoral dissertation]. Macquarie University; 2014. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1959.14/1127709.

Council of Science Editors:

Sun Z. Multi-band dual-polarized shared aperture microstrip phased array. [Doctoral Dissertation]. Macquarie University; 2014. Available from: http://hdl.handle.net/1959.14/1127709

Texas State University – San Marcos

17. Khanal, Jagadish. Design of Four Element Patch Array Antenna for IEEE 802.11 at 2.4 GHz.

Degree: MS, Engineering, 2019, Texas State University – San Marcos

URL: https://digital.library.txstate.edu/handle/10877/8137

► This is a very exciting time to investigate microstrip (aka. patch or printed) antennas because the world of technology is ready to take a big… (more)

▼ This is a very exciting time to investigate microstrip (aka. patch or printed) antennas because the world of technology is ready to take a big step towards the Internet of Things (IOT). With IOT almost every device we are involved with will communicate with one another. The only reasonable medium for communication will be wireless communication. Wireless communication involves antennas and antenna design always involves topics like size, flexibility, power consumption, efficiency, cost and weight. Out of the myriad list of antennas present in today’s world, microstrip antennas are among the most promising when it comes to ease of fabrication and extremely low profiles. They can hide under circuit boards, they can be made super flexible and very light. It is a wise assumption that almost all IOT devices will employ a printed antenna. In this thesis design, simulation, optimization, fabrication and characterization of a rectangular patch antenna has been done. The designed antenna was compatible with the IEEE 802.11b protocol for Wi-Fi as it was resonating at 2.4 GHz and the other antenna parameters like bandwidth, gain and Half Power Beam Width (HPBW) were also suitable for the protocol. This antenna was then used to design a four element patch array antenna. The performance of the array antenna was then compared with respect to the initially designed single rectangular patch antenna. After characterizing the array antenna in an anechoic chamber it was found that the array antenna has a gain of 12.5 dB which is 5.21 dB higher than the simulated gain of the initially designed single element antenna. The array antenna has a frequency bandwidth of 70 MHz and an efficiency of 80%. Both single element antenna and the array antenna can be used as a radiating element for IEEE 802.11b protocol. However, out of fourteen channels defined under the protocol, the single element antenna can fully support only up to channel number eight and partially support channel number nine. The array can fully support up to channel number ten and partially support channel number eleven. Advisors/Committee Members: Stern, Harold (advisor), Stephan, Karl D. (advisor), Compeau, Rich (committee member), Stapleton, Bill (committee member).

Subjects/Keywords: Microstrip antenna; Array; Transmission line; Gain; Microstrip antennas; Wireless communication systems

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Khanal, J. (2019). Design of Four Element Patch Array Antenna for IEEE 802.11 at 2.4 GHz. (Masters Thesis). Texas State University – San Marcos. Retrieved from https://digital.library.txstate.edu/handle/10877/8137

Chicago Manual of Style (16^th Edition):

Khanal, Jagadish. “Design of Four Element Patch Array Antenna for IEEE 802.11 at 2.4 GHz.” 2019. Masters Thesis, Texas State University – San Marcos. Accessed January 23, 2021. https://digital.library.txstate.edu/handle/10877/8137.

MLA Handbook (7^th Edition):

Khanal, Jagadish. “Design of Four Element Patch Array Antenna for IEEE 802.11 at 2.4 GHz.” 2019. Web. 23 Jan 2021.

Vancouver:

Khanal J. Design of Four Element Patch Array Antenna for IEEE 802.11 at 2.4 GHz. [Internet] [Masters thesis]. Texas State University – San Marcos; 2019. [cited 2021 Jan 23]. Available from: https://digital.library.txstate.edu/handle/10877/8137.

Council of Science Editors:

Khanal J. Design of Four Element Patch Array Antenna for IEEE 802.11 at 2.4 GHz. [Masters Thesis]. Texas State University – San Marcos; 2019. Available from: https://digital.library.txstate.edu/handle/10877/8137

University of Oulu

18. Komulainen, M. (Mikko). Bandwidth enhanced antennas for mobile terminals and multilayer ceramic packages.

Degree: 2009, University of Oulu

URL: http://urn.fi/urn:isbn:9789514290879

► Abstract In this thesis, bandwidth (BW) enhanced antennas for mobile terminals and multilayer ceramic packages are presented. The thesis is divided into two parts. In… (more)

▼ Abstract In this thesis, bandwidth (BW) enhanced antennas for mobile terminals and multilayer ceramic packages are presented. The thesis is divided into two parts. In the first part, electrically frequency-tunable mobile terminal antennas have been studied. The first three antennas presented were of a dual-band planar inverted-F type (PIFA) and were tuned to operate in frequency bands appropriate to the GSM850 (824–894 MHz), GSM900 (880–960 MHz), GSM1800 (1710–1880 MHz), GSM1900 (1850–1990 MHz) and UMTS (1920–2170 MHz) cellular telecommunication standards with RF PIN diode switches. The first antenna utilized a frequency-tuning method developed in this thesis. The method was based on an integration of the tuning circuitry into the antenna. The tuning of the second antenna was based on a switchable parasitic antenna element. By combining the two frequency-tuning approaches, a third PIFA could be switched to operate in eight frequency bands. The planar monopole antennas researched were varactor-tunable for digital television signal reception (470–702 MHz) and RF PIN diode switchable dual-band antenna for operation at four cellular bands. The key advantage of the former antenna was a compact size (0.7 cm3), while for the latter one, a tuning circuit was implemented without using separate DC wiring for controlling the switch component. The second part of the thesis is devoted to multilayer ceramic package integrated microwave antennas. In the beginning, the use of a laser micro-machined embedded air cavity was proposed to enable antenna size to impedance bandwidth (BW) trade-off for a microwave microstrip in a multilayer monolithic ceramic media. It was shown that the BW of a 10 GHz antenna fabricated on a low temperature co-fired ceramic (LTCC) substrate could be doubled with this technique. Next, the implementation of a compact surface mountable LTCC antenna package operating near 10 GHz was described. The package was composed of a BW optimized stacked patch microstrip antenna and a wide-band vertical ball grid array (BGA)-via interconnection. Along with the electrical performance optimization, an accurate circuit model describing the antenna structure was presented. Finally, the use of low-sintering temperature non-linear dielectric Barium Strontium Titanate (BST) thick films was demonstrated in a folded slot antenna operating at 3 GHz and frequency-tuned with an integrated BST varactor.

Subjects/Keywords: LTCC; frequency-tunable antennas; microstrip antennas; mobile terminals; package integration; planar inverted-F antennas; planar monopole antennas; slot antennas; small antennas

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Komulainen, M. (. (2009). Bandwidth enhanced antennas for mobile terminals and multilayer ceramic packages. (Doctoral Dissertation). University of Oulu. Retrieved from http://urn.fi/urn:isbn:9789514290879

Chicago Manual of Style (16^th Edition):

Komulainen, M (Mikko). “Bandwidth enhanced antennas for mobile terminals and multilayer ceramic packages.” 2009. Doctoral Dissertation, University of Oulu. Accessed January 23, 2021. http://urn.fi/urn:isbn:9789514290879.

MLA Handbook (7^th Edition):

Komulainen, M (Mikko). “Bandwidth enhanced antennas for mobile terminals and multilayer ceramic packages.” 2009. Web. 23 Jan 2021.

Vancouver:

Komulainen M(. Bandwidth enhanced antennas for mobile terminals and multilayer ceramic packages. [Internet] [Doctoral dissertation]. University of Oulu; 2009. [cited 2021 Jan 23]. Available from: http://urn.fi/urn:isbn:9789514290879.

Council of Science Editors:

Komulainen M(. Bandwidth enhanced antennas for mobile terminals and multilayer ceramic packages. [Doctoral Dissertation]. University of Oulu; 2009. Available from: http://urn.fi/urn:isbn:9789514290879

Cape Peninsula University of Technology

19. Maqina, Sinamandla Mvuyisi. X-band antenna design for nano-satellite applications .

Degree: 2018, Cape Peninsula University of Technology

URL: http://etd.cput.ac.za/handle/20.500.11838/2703

► This research report discusses feasible designs of conformal antennas that provide a proof of concept for the French South African Institute of Technology’s future needs.… (more)

▼ This research report discusses feasible designs of conformal antennas that provide a proof of concept for the French South African Institute of Technology’s future needs. The design is to be used in forthcoming space missions and the intention is to mount the antenna on the surface of a spacecraft. Hence, a low profile is mandatory along with good circular polarisation radiation characteristics. Microstrip patch antennas have been chosen for this purpose simply because they have low profile and conform to most structures, thus fulfilling the requirements stated above. All the designs that are featured in this thesis were modelled and validated using the electromagnetic simulation software FEKO and prototypes were built and tested. The simulations and measured results are supplemented by theory. Sometimes it can be challenging to design and develop an antenna that fulfils the required performance goals given the size and weight restrictions that are specified for nano-satellite technology. Therefore, the first phase of this project finds a good balance between the criteria set for CubeSat platforms and antenna performance. The second phase is validation. Single patch antennas and a sequential rotated patch array were designed, built and tested. The sequential rotated patch array offers considerable improvements in performance when compared to single patch antennas. For instance, the 3 dB axial ratio bandwidth increased to 9.6 % from 2 % when a sequential rotated array was used. The CubeSat normally flies in the inclined regions of the low Earth orbit (LEO). This area has high-energy auroral electron fluxes, in which the high-density electrons build up on ungrounded surfaces of spacecraft and cause discharge arcing. The discharge can affect the satellite operation and, in the worst case, cause permanent damage to the components. A mitigation technique by means of a bleeding path provides a quick route to ground and the space-qualified material that is used will ensure that the antenna is robust enough to survive this.

Subjects/Keywords: Antennas (Electronics); Nanosatellites; CubeSat; Microstrip antennas – Design and construction

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Maqina, S. M. (2018). X-band antenna design for nano-satellite applications . (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/2703

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):

Maqina, Sinamandla Mvuyisi. “X-band antenna design for nano-satellite applications .” 2018. Thesis, Cape Peninsula University of Technology. Accessed January 23, 2021. http://etd.cput.ac.za/handle/20.500.11838/2703.

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

MLA Handbook (7^th Edition):

Maqina, Sinamandla Mvuyisi. “X-band antenna design for nano-satellite applications .” 2018. Web. 23 Jan 2021.

Vancouver:

Maqina SM. X-band antenna design for nano-satellite applications . [Internet] [Thesis]. Cape Peninsula University of Technology; 2018. [cited 2021 Jan 23]. Available from: http://etd.cput.ac.za/handle/20.500.11838/2703.

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

Council of Science Editors:

Maqina SM. X-band antenna design for nano-satellite applications . [Thesis]. Cape Peninsula University of Technology; 2018. Available from: http://etd.cput.ac.za/handle/20.500.11838/2703

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

Indian Institute of Science

20. Behera, Subhrakanta. Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations.

Degree: PhD, Faculty of Engineering, 2013, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/2059

► In this research we attempted several modifications to microstrip ring/loop antennas to design multi-frequency antennas through systematic approaches. Such multi-frequency antennas can be useful while… (more)

Subjects/Keywords: Microstrip Ring Antennas; Multi-frequency Ring Antennas; Dual-frequency Ring Antennas; Microstrip Ring Antennas - Design and Analysis; Microstrip Ring Antennas - Simulation; Multi-Ring Multi-band Antennas; Microstrip Antenna; Ring Antennas; Multi-port Network Model (MNM); Multi-frequency Antennas; Communication Engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Behera, S. (2013). Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2059

Chicago Manual of Style (16^th Edition):

Behera, Subhrakanta. “Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations.” 2013. Doctoral Dissertation, Indian Institute of Science. Accessed January 23, 2021. http://etd.iisc.ac.in/handle/2005/2059.

MLA Handbook (7^th Edition):

Behera, Subhrakanta. “Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations.” 2013. Web. 23 Jan 2021.

Vancouver:

Behera S. Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2013. [cited 2021 Jan 23]. Available from: http://etd.iisc.ac.in/handle/2005/2059.

Council of Science Editors:

Behera S. Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations. [Doctoral Dissertation]. Indian Institute of Science; 2013. Available from: http://etd.iisc.ac.in/handle/2005/2059

21. Sarin, V P. Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas.

Degree: Electronics, 2012, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/3270

►

With the recent progress and rapid increase in mobile terminals, the design of antennas for small mobile terminals is acquiring great importance. In view of… (more)

▼

With the recent progress and rapid increase in mobile terminals, the design of antennas for small mobile terminals is acquiring great importance. In view of this situation, several design concepts are already been addressed by the scientists and engineers. Compactness and efficiency are the major criteria for mobile terminal antennas. The challenging task of the microwave scientists and engineers is to device compact printed radiating systems having broadband behavior, together with good efficiency. Printed antenna technology has received popularity among antenna scientists after the introduction of microstrip antenna in 1970s. The successors in this kind such as printed monopoles and planar inverted F are also equally important. Scientists and Engineers are trying to explore this technology as a viable coast effective solution for forthcoming microwave revolution. The transmission line perspectives of antennas are very interesting. The concept behind any electromagnetic radiator is simple. Any electromagnetic system with a discontinuity is radiating electromagnetic energy. The size, shape and the orientation of the discontinuities controls the radiation characteristics of the system such as radiation pattern, gain, polarization etc. It can be either resonant or non resonant structure. Microstrip antennas are suitable for wireless applications due to their low cost, high gain and ease of fabrication. But the major disadvantage of micro strip antennas is their inherent narrow bandwidth. A lot of techniques are introduced by the researchers all over the world to enhance the bandwidth of micro strip patch antennas. The thesis addresses an attempt to enhance the bandwidth of micro strip patch antennas by incorporating impedance matching strip as a part of the micro strip patch antenna. The first part of the thesis deals with the broadband operation of the tilted square slot and polygonal slot loaded square micro strip patch antennas. The resonant mechanisms are clearly mentioned using the simulation and experimental studies. The bandwidth of the polygonal slotted broadband patch antenna is again enhanced by implementing an Lstrip feed mechanism. In the second major part of the thesis, a novel gain enhancement technique for single band and broadband square micro strip patch antennas is achieved by implementing offset stacked configurations.

Cochin University of Science and Technology

Subjects/Keywords: Microstrip Antennas; Radiation from a microstrip antenna; Models/Techniques used in the analysis of microstrip antennas; Fabrication of microstrip antennas; Antenna measurements HFSS: 3D Electromagnetic simulator; Evolution of the antenna

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Sarin, V. P. (2012). Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/3270

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):

Sarin, V P. “Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas.” 2012. Thesis, Cochin University of Science and Technology. Accessed January 23, 2021. http://dyuthi.cusat.ac.in/purl/3270.

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

MLA Handbook (7^th Edition):

Sarin, V P. “Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas.” 2012. Web. 23 Jan 2021.

Vancouver:

Sarin VP. Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas. [Internet] [Thesis]. Cochin University of Science and Technology; 2012. [cited 2021 Jan 23]. Available from: http://dyuthi.cusat.ac.in/purl/3270.

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

Council of Science Editors:

Sarin VP. Investigations on the Radiation Characteristics of Broadband Strip Loaded Slotted Microstrip Antennas. [Thesis]. Cochin University of Science and Technology; 2012. Available from: http://dyuthi.cusat.ac.in/purl/3270

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

University of California – San Diego

22. Avser, Bilgehan. Frequency Tunable Antennas and Novel Phased Array Feeding Networks for Next Generation Communication Systems.

Degree: Electrical Engineering (Electronic Circuits and Systems), 2015, University of California – San Diego

URL: http://www.escholarship.org/uc/item/6cq329s4

► The thesis presents three dual-band frequency tunable antennas for carrier aggregation systems and two new feeding networks for reducing the number of phase shifters in… (more)

▼ The thesis presents three dual-band frequency tunable antennas for carrier aggregation systems and two new feeding networks for reducing the number of phase shifters in limited-scan arrays. First, single- and dual-feed, dual-frequency, low-profile antennas with independent frequency tuning using varactor diodes are presented. The dual-feed planar inverted F-antenna (PIFA) has two operating frequencies which are independently tuned at 0.7 – 1.1 GHz and at 1.7 – 2.3 GHz with better than −10 dB impedance match. The isolation between the high-band and the low-band ports is > 13 dB; hence, one resonant frequency can be tuned without affecting the other. The single-feed contiguous-dual-band antenna has two resonant frequencies, which are independently tuned at 1.2 – 1.6 GHz at 1.6 – 2.3 GHz with better than −10 dB impedance match for most of the tuning range. And the single-feed dual-band antenna has two resonant frequencies, which are independently tuned at 0.7 – 1.0 GHz at 1.7 – 2.3 GHz with better than −10 dB impedance match for most of the tuning range. The tuning is done using varactor diodes with a capacitance range from 0.8 to 3.8 pF, which is compatible with RF MEMS devices. The antenna volumes are 63 × 100 × 3.15 mm³ on ε_r = 3.55 substrates and the measured antenna efficiencies vary between 25% and 50% over the tuning range. The application areas are in carrier aggregation systems for fourth generation (4G) wireless systems. Next, a new phased array feeding network that employs random sequences of non-uniform sub-arrays (and a single phase shifter for each sub-array) is presented. When these sequences are optimized, the resulting phased arrays can scan over a wide region with low sidelobe levels. Equations for analyzing the random arrays and an algorithm for optimizing the array sequences are presented. Multiple random-solutions with different number of phase shifters and different set of sub-array groups are analyzed and design guidelines are presented. The performance of the random array feeding scheme is compared to the conventional uniform sub-arraying for multiple cases. It is shown that with the random feeding networks, the number of phase shifters can be reduced up to 30% while preserving the system performance. This results in more affordable and more reliable systems. The proposed feeding network is demonstrated for a 30 element array of slot- fed patch antennas at 7.9 GHz. The fabricated array uses 12 phase shifters, has a half power beamwidth (HPBW) of 4^o and can scan up to ± 14^o with sidelobe levels less than -15 dB.Another phase shifter reducing method, the interwoven feeding networks, is investigated. These passive feeding networks are composed of power dividers, couplers and resistive attenuators. In this configuration, each phase shifter feeds all of the antennas and creates a sinc-like current distribution over the array elements which results in a boxcar function-like element pattern. This element pattern is used to cancel the grating lobes. By changing the…

Subjects/Keywords: Electrical engineering; Electromagnetics; Beam Forming; Microstrip Antennas; Phased-Arrays; Reconfigurable Antennas; Tunable Antennas

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Avser, B. (2015). Frequency Tunable Antennas and Novel Phased Array Feeding Networks for Next Generation Communication Systems. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/6cq329s4

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):

Avser, Bilgehan. “Frequency Tunable Antennas and Novel Phased Array Feeding Networks for Next Generation Communication Systems.” 2015. Thesis, University of California – San Diego. Accessed January 23, 2021. http://www.escholarship.org/uc/item/6cq329s4.

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

MLA Handbook (7^th Edition):

Avser, Bilgehan. “Frequency Tunable Antennas and Novel Phased Array Feeding Networks for Next Generation Communication Systems.” 2015. Web. 23 Jan 2021.

Vancouver:

Avser B. Frequency Tunable Antennas and Novel Phased Array Feeding Networks for Next Generation Communication Systems. [Internet] [Thesis]. University of California – San Diego; 2015. [cited 2021 Jan 23]. Available from: http://www.escholarship.org/uc/item/6cq329s4.

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

Council of Science Editors:

Avser B. Frequency Tunable Antennas and Novel Phased Array Feeding Networks for Next Generation Communication Systems. [Thesis]. University of California – San Diego; 2015. Available from: http://www.escholarship.org/uc/item/6cq329s4

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

Stellenbosch University

23. Klopper, Brandt. Fast design and optimisation of one-dimensional microstrip patch antenna arrays.

Degree: MEng, Electrical and Electronic Engineering, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/98501

►

ENGLISH ABSTRACT: This thesis proposes a method for the design of one-dimensional, uniformly spaced, nonuniform amplitude microstrip patch antenna arrays using computationally inexpensive transmission-line models… (more)

▼

ENGLISH ABSTRACT: This thesis proposes a method for the design of one-dimensional, uniformly spaced, nonuniform amplitude microstrip patch antenna arrays using computationally inexpensive transmission-line models and space mapping surrogate-based optimisation. The method provides consistent and effective results for both impedance specifications and radiation specifications, and is significantly faster than conventional full-wave optimisation procedures. The method is developed for microstrip-fed, probe-fed and aperture-fed rectangular microstrip antennas. Transmission-line models of each geometry are developed and run through a set of validation experiments to test their effectiveness over a range of substrate choices. The models are shown to perform with reasonable accuracy for a practical set of substrates, to the point where they are useful coarse models in space mapping optimisation procedures. An optimisation framework is set out to apply the space mapping paradigm to the design of the three aforementioned patch element geometries, as well as the design of a one-dimensional array. Several types of space mapping techniques are tested on each design problem, and the most efficient is selected to incorporate into the main design method of the thesis. The method incorporates the design of the individual patch antenna elements, the array layout and the finite antenna/feed substrate dimensions. The method is developed to accommodate microstrip feeds, probe feeds and aperture-coupled feeds to the patch antenna elements. A design procedure is developed to design a one-dimensional patch antenna array to a desired impedance and radiation specification. The procedure is tested with 2 experimental S-band designs; a narrowband probe-fed 1x8 patch array and a wideband aperture-fed 1x8 patch array. The aperture-coupled patch array achieves 10% fractional bandwidth over a -10 dB |𝑆11| passband, and exhibits 13.9° 3dB-beamwidth and -20.6 dB sidelobe-level in its gain pattern, across its passband. The total solver runtime of the entire aperture-coupled patch antenna array optimisation process amounts to 1708.14s (28.47 minutes). The design method is modular, efficient and integrated with a general space mapping optimisation software framework. It is highly expandable and is one of few, if any works to apply a transmission-line model to the space mapping optimisation of an aperture-coupled patch antenna.

AFRIKAANSE OPSOMMING: Hierdie tesis stel ŉ metode voor vir die ontwerp van eendimensionele, uniforme gespasieerde, nie-uniform amplitude, mikrostrook plak antenna skikking met die gebruik van lae-intensiewe numeriese transmissielyn modelle en spasie-karterings surrogaat-gebaseerde optimisasies. Die metode lewer konsekwente en effektiewe resultate vir beide impedansie- en stralingspesifikasies. Die metode is beduidend vinniger as konvensionele vol-golf optimisasie prosedures. Die metode is ontwikkel vir koplanêr-gevoed, probe-gevoed en gleuf-gevoerde reghoekige mikrostrook antennas. Transmissielyn modelle is ontwerp vir…

Advisors/Committee Members: De Villiers, D. I. L., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: UCTD; Antenna arrays – Design; Microstrip antennas – Design; Strip transimission lines; Microstrip antennas – Design and construction – Data processing; Computer-aided design

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Klopper, B. (2016). Fast design and optimisation of one-dimensional microstrip patch antenna arrays. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/98501

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):

Klopper, Brandt. “Fast design and optimisation of one-dimensional microstrip patch antenna arrays.” 2016. Thesis, Stellenbosch University. Accessed January 23, 2021. http://hdl.handle.net/10019.1/98501.

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

MLA Handbook (7^th Edition):

Klopper, Brandt. “Fast design and optimisation of one-dimensional microstrip patch antenna arrays.” 2016. Web. 23 Jan 2021.

Vancouver:

Klopper B. Fast design and optimisation of one-dimensional microstrip patch antenna arrays. [Internet] [Thesis]. Stellenbosch University; 2016. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10019.1/98501.

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

Council of Science Editors:

Klopper B. Fast design and optimisation of one-dimensional microstrip patch antenna arrays. [Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/98501

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

University of Missouri – Kansas City

24. Elsewe, Mohamed Mahmoud. Design Guidelines, Scan Behavior and Characteristic Mode Analysis for a Class of Ultra-Wideband Microstrip Patch Antennas.

Degree: PhD, 2016, University of Missouri – Kansas City

URL: http://hdl.handle.net/10355/59257

► Ultra-wideband (UWB), low-profile microstrip patch antennas and phased arrays have their niche in many wireless communication and medical applications. In recent years, the U-slot patch… (more)

▼ Ultra-wideband (UWB), low-profile microstrip patch antennas and phased arrays have their niche in many wireless communication and medical applications. In recent years, the U-slot patch antenna established itself as a versatile antenna that can be fine-tuned for ultra-wideband operations. The L-shaped probe feeding method has additionally led to improved impedance bandwidth for the U-slot patch antenna. The L-probe’s simple structure together with its low production cost makes it an attractive feeding method for the U-slot microstrip patch antenna. In phased arrays, scan blindness due to surface wave excitations can reduce the scan bandwidth range. By reducing the mutual coupling between array elements, the scan blindness effects will be reduced. Also, by reducing the sidelobe levels and minimizing the effect of grating lobes in phased arrays, the array’s scan performance and power efficiency can be improved. In this dissertation, (1) a parametric study is performed on εr = 2.2 and 4.5 substrates for the design of ideal L-probe feed dimensions with optimum impedance bandwidth. Results show that first-pass optimum impedance bandwidth of over 50% is achieved using the ideal L-probe feed dimensions. (2) The mutual coupling between a 2-element UWB microstrip array using different patch orientations and U-slot topologies is examined for εr = 2.2 and 4.5 substrates to reduce the effect of scan blindness. Results, for εr = 2.2 substrate, indicate that a diamond patch orientation with opposite U-slot topology presents the least coupling between the array elements. For εr = 4.5 substrate, the E-plane patch orientation with parallel U-slot topology has the least coupling. (3) The scan behavior of 5x5 planar phased arrays using different patch orientations and U-slot topologies is examined for εr = 2.2 substrate. Results indicate that blind spots are less prevalent in the diamond patch orientation and more prevalent in the E-plane patch orientation which has the most coupling between the array elements. (4) The array patterns of a 17-element L-probe-fed U-slot microstrip linear phased array are examined at different combinations of uniform and nonuniform excitation and inter-element spacing. Results indicate that using nonuniform excitation and inter-element spacing can reduce the sidelobe levels by over -10dB as the array is scanned 60° away from broadside. (5) Lastly, the Theory of Characteristic Modes (TCM) is used to characterize the resonant behavior of different microstrip patch shapes, substrates and excitation feeds to realize a microstrip patch antenna design with optimum broadband behavior. Results indicate that a single-layer U-slot rectangular patch on εr = 4.4 substrate presents a highly radiating structure. Further modal analysis of this single-layer structure with a single T-probe feed shows that VSWR ≤ 2 impedance bandwidth in the order of 96% can be achieved. Experimental results show VSWR ≤ 2 impedance bandwidth in the order of 71%. Advisors/Committee Members: Chatterjee, Deb, 1959- (advisor).

Subjects/Keywords: Microstrip antennas; Phased array antennas; Dissertation – University of Missouri – Kansas City – Computer science

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Elsewe, M. M. (2016). Design Guidelines, Scan Behavior and Characteristic Mode Analysis for a Class of Ultra-Wideband Microstrip Patch Antennas. (Doctoral Dissertation). University of Missouri – Kansas City. Retrieved from http://hdl.handle.net/10355/59257

Chicago Manual of Style (16^th Edition):

Elsewe, Mohamed Mahmoud. “Design Guidelines, Scan Behavior and Characteristic Mode Analysis for a Class of Ultra-Wideband Microstrip Patch Antennas.” 2016. Doctoral Dissertation, University of Missouri – Kansas City. Accessed January 23, 2021. http://hdl.handle.net/10355/59257.

MLA Handbook (7^th Edition):

Elsewe, Mohamed Mahmoud. “Design Guidelines, Scan Behavior and Characteristic Mode Analysis for a Class of Ultra-Wideband Microstrip Patch Antennas.” 2016. Web. 23 Jan 2021.

Vancouver:

Elsewe MM. Design Guidelines, Scan Behavior and Characteristic Mode Analysis for a Class of Ultra-Wideband Microstrip Patch Antennas. [Internet] [Doctoral dissertation]. University of Missouri – Kansas City; 2016. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10355/59257.

Council of Science Editors:

Elsewe MM. Design Guidelines, Scan Behavior and Characteristic Mode Analysis for a Class of Ultra-Wideband Microstrip Patch Antennas. [Doctoral Dissertation]. University of Missouri – Kansas City; 2016. Available from: http://hdl.handle.net/10355/59257

Anna University

25. Suganthi, S. Certain investigations on the performance of various types of fractal antennas metamaterial antennas and filter; -.

Degree: Information and Communication Engineering, 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/24398

►

This Research proposes a new set of microstrip antennas with improved performances for wireless communications by combining the fractal and metamaterial concepts without compromising the… (more)

Subjects/Keywords: Filter; Fractal antenna; Information and communication engineering; Metamaterial antennas; Microstrip antennas; Wireless communications

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Suganthi, S. (2014). Certain investigations on the performance of various types of fractal antennas metamaterial antennas and filter; -. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/24398

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):

Suganthi, S. “Certain investigations on the performance of various types of fractal antennas metamaterial antennas and filter; -.” 2014. Thesis, Anna University. Accessed January 23, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/24398.

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

MLA Handbook (7^th Edition):

Suganthi, S. “Certain investigations on the performance of various types of fractal antennas metamaterial antennas and filter; -.” 2014. Web. 23 Jan 2021.

Vancouver:

Suganthi S. Certain investigations on the performance of various types of fractal antennas metamaterial antennas and filter; -. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Jan 23]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24398.

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

Council of Science Editors:

Suganthi S. Certain investigations on the performance of various types of fractal antennas metamaterial antennas and filter; -. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24398

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

26. Merola, Christopher S. Resonant Antennas Based on Coupled Transmission-Line Metamaterials.

Degree: MS, Electrical & Computer Engineering, 2011, University of Massachusetts

URL: https://scholarworks.umass.edu/theses/629

► A novel microstrip patch antenna topology is presented for achieving a dual-band response with arbitrarily closely spaced resonances. This topology is based on a… (more)

▼ A novel microstrip patch antenna topology is presented for achieving a dual-band response with arbitrarily closely spaced resonances. This topology is based on a coupled transmission line structure in order to take advantage of the separation in propagation constants for parallel (even-mode) and anti-parallel (odd-mode) current modes. Applying a metamaterials inspired design approach, periodic reactive loadings are used to design the underlying transmission line to have specific propagation constants necessary to realize a desired separation between two resonant frequencies. Using a single probe feed for a finite coupled line segment, both even-and odd-mode resonances can be excited to radiate efficiently at their respective design frequencies. The efficiency of the odd-mode radiation is enhanced by separating the two lines, while strong coupling is maintained by inserting a series of narrowly-separated thin loops between them. Several example resonant antenna designs, in the 2.45 GHz band, are presented. The directivities of these microstrip patch antennas are enhanced by optimizing the physical length of the resonant structure. For a resonant antenna obtained by cascading several unit cells of reactively loaded microstrip segments, dispersion analysis is employed for the unit-cell design. Maximum directivity is achieved by choosing the overall physical length to be slightly less than a half wavelength in free space at the design frequency. This gain optimization is applied to three coupled-line antennas, as well as a single resonance patch. Excellent agreement is observed between simulated and measured responses across all designs. The potential of loading the coupled line structure with active components is also explored. Varactor diodes are placed on coupled-line structures in two configurations. In one configuration, both resonant frequencies are affected. In the other configuration, only the odd-mode characteristics are reconfigured. In this way, the resonant frequency of either one or both modes can be adjusted by applying a DC bias voltage to the varactor diode loading elements. Two antennas, one employing each of these topologies, were designed and fabricated. Control of the resonant frequency over the predicted range through applying a bias voltage is observed with the fabricated prototypes. Advisors/Committee Members: Do-Hoon Kwon.

Subjects/Keywords: Antenna radiation patterns; metamaterials; microstrip antennas; patch antennas; propagation constant.; Electromagnetics and Photonics

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Merola, C. S. (2011). Resonant Antennas Based on Coupled Transmission-Line Metamaterials. (Masters Thesis). University of Massachusetts. Retrieved from https://scholarworks.umass.edu/theses/629

Chicago Manual of Style (16^th Edition):

Merola, Christopher S. “Resonant Antennas Based on Coupled Transmission-Line Metamaterials.” 2011. Masters Thesis, University of Massachusetts. Accessed January 23, 2021. https://scholarworks.umass.edu/theses/629.

MLA Handbook (7^th Edition):

Merola, Christopher S. “Resonant Antennas Based on Coupled Transmission-Line Metamaterials.” 2011. Web. 23 Jan 2021.

Vancouver:

Merola CS. Resonant Antennas Based on Coupled Transmission-Line Metamaterials. [Internet] [Masters thesis]. University of Massachusetts; 2011. [cited 2021 Jan 23]. Available from: https://scholarworks.umass.edu/theses/629.

Council of Science Editors:

Merola CS. Resonant Antennas Based on Coupled Transmission-Line Metamaterials. [Masters Thesis]. University of Massachusetts; 2011. Available from: https://scholarworks.umass.edu/theses/629

RMIT University

27. Elmezughi, A. Investigation of methods for integrating broadband microstrip patch antennas.

Degree: 2008, RMIT University

URL: http://researchbank.rmit.edu.au/view/rmit:6661

► The use of the microstrip antenna has grown rapidly for the last two decades, because of the increasing demand for a low profile antenna with… (more)

▼ The use of the microstrip antenna has grown rapidly for the last two decades, because of the increasing demand for a low profile antenna with small size, low cost, and high performance over a large spectrum of frequencies. However, despite the advantages microstrip antennas provide, a number of technical challenges remain to be solved for microstrip antennas to reach their full potential, particularly if they are to be interfaced with monolithic circuits. The objective of this thesis is to examine novel methods for integrating and constructing broadband microstrip antennas, particularly at high microwave and millimeter wave frequencies where dimensions get very small and fabrication tolerances are critical. The first stage of the thesis investigates techniques to reduce the spurious feed radiation and surface wave generation from edge-fed patch antennas. A technique to reduce the spurious radiation from the edge-fed patch antenna by using a dielectric filled cavity behind the radiating element is explored. From this, a single element edge-fed cavity backed patch antenna was developed. Measured results showed low levels of cross polarization, making it suitable for dual or circular polarization applications. A 2 x 2 edge-fed cavity backed patch antenna array was also developed, which benefited greatly from this new technique due to the extensive feed network required. Furthermore, investigation into edge-fed cavity backed patches on high dielectric materials was also conducted. The measured impedance bandwidth of this edge-fed cavity backed patch is three times greater than the conventional edge-fed patch, and the gain increases to 5.1 dBi compared to 3.6 dBi. Further bandwidth enhancement of the single element edge-fed cavity backed antenna on high dielectric material was achieved by applying the hi-lo substrate structure. The hi-lo substrate structure produced an increase in the bandwidth to 26% from the 1.7% of the single element edge-fed cavity backed patch, while maintaining pattern integrity and radiation efficiency. Next, the development of a flip-chip bonding technique was investigated to enhance the fabrication accuracy and robustness of multilayer antennas on high dielectric materials. This technique was proven through simulation and experiment to provide good impedance and radiation performance via the high accuracy placement of the superstrate layer. The single element flip-chip patch antenna uses a high dielectric constant material for both the base and the patch superstrate, whereas the stacked flip-chip patch again uses a high and low permittivity material combination to achieve efficient wideband performance. Due to the high permittivity feed material, these antennas display the attributes required for integration with MMICs. The measured 10 dB return loss bandwidth of the single element was 4% with a gain of 4.6 dBi, whereas the stacked flip-chip patch showed very broadband performance, with a bandwidth of 23% with a gain of 8.5 dBi. The high accuracy placement and rigid attachment of the upper…

Subjects/Keywords: Fields of Research; Microstrip antennas – Design and construction

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Elmezughi, A. (2008). Investigation of methods for integrating broadband microstrip patch antennas. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:6661

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):

Elmezughi, A. “Investigation of methods for integrating broadband microstrip patch antennas.” 2008. Thesis, RMIT University. Accessed January 23, 2021. http://researchbank.rmit.edu.au/view/rmit:6661.

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

MLA Handbook (7^th Edition):

Elmezughi, A. “Investigation of methods for integrating broadband microstrip patch antennas.” 2008. Web. 23 Jan 2021.

Vancouver:

Elmezughi A. Investigation of methods for integrating broadband microstrip patch antennas. [Internet] [Thesis]. RMIT University; 2008. [cited 2021 Jan 23]. Available from: http://researchbank.rmit.edu.au/view/rmit:6661.

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

Council of Science Editors:

Elmezughi A. Investigation of methods for integrating broadband microstrip patch antennas. [Thesis]. RMIT University; 2008. Available from: http://researchbank.rmit.edu.au/view/rmit:6661

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

NSYSU

28. Kuo, Jieh-Sen. Novel Broadband Designs of Microstrip Antennas.

Degree: PhD, Electrical Engineering, 2001, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0430101-171746

► Novel broadband designs of microstrip antennas have been proposed in this dissertation, including bandwidth enhancement using integrated reactive loading, broadband circularly polarized designs, broadband dual-frequency… (more)

Subjects/Keywords: MICROSTRIP ANTENNAS; CIRCULARLY POLARIZED OPERA

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Kuo, J. (2001). Novel Broadband Designs of Microstrip Antennas. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0430101-171746

Chicago Manual of Style (16^th Edition):

Kuo, Jieh-Sen. “Novel Broadband Designs of Microstrip Antennas.” 2001. Doctoral Dissertation, NSYSU. Accessed January 23, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0430101-171746.

MLA Handbook (7^th Edition):

Kuo, Jieh-Sen. “Novel Broadband Designs of Microstrip Antennas.” 2001. Web. 23 Jan 2021.

Vancouver:

Kuo J. Novel Broadband Designs of Microstrip Antennas. [Internet] [Doctoral dissertation]. NSYSU; 2001. [cited 2021 Jan 23]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0430101-171746.

Council of Science Editors:

Kuo J. Novel Broadband Designs of Microstrip Antennas. [Doctoral Dissertation]. NSYSU; 2001. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0430101-171746

NSYSU

29. Pan, Chin-Ju. Parameter Tuning of Microstrip Antennas Design using Genetic Algorithm.

Degree: PhD, Computer Science and Engineering, 2006, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1020106-170717

► In recent years, microstrip antennas are suitable for applications in wireless communication systems because they have the characteristics of compact size, light weight, low cost… (more)

▼ In recent years, microstrip antennas are suitable for applications in wireless communication systems because they have the characteristics of compact size, light weight, low cost and easy to manufacture. So, they play an important role in the navigation equipment of the rocket, space shutter, personal communication, etc. However, in the design and synthesis of antennas, there are a large number of design variables that affect the antenna performance. In early stages, some researchers did not use any optimization tool in parameter tuning of antennas design. The one utilized most is the âtrial and errorâ method, which is very time-consuming in order to find a suitable solution to verify the possibilities of the antenna structure. Genetic algorithms have been shown to be effective in the design of broadband microstrip antenna. However, their effectiveness with various degrees depends on the skills of the different genetic algorithms. In this dissertation, we propose a Genetic Algorithm (GA)-based refined method to enhance the effectiveness and to solve the gap-coupled microstrip antenna design problem (largest impedance bandwidth). The refined method with optimization process improves the computing performance comparing with the conventional genetic algorithm. By the refined GA method, bandwidth can be widened up to 3.84 times that of a single excited patch. Furthermore, we present a new design for Ultra Wideband (UWB) antenna. In the new research topic, it is expected that the genetic algorithm can find out a range of feasible (range-based) solutions instead of a few of solutions. As a result, the manufacturing process will have more convenience and practicability. Finally, we propose a new method to overcome the problem of signal interference with the UWB system operations. A band notched characteristic is achieved for the antenna to restrain the interference bandwidth. The disclosed antenna and the circuitry for the antenna system are easily integrated. With the simple structure, the fabrication cost for the antenna is also reduced. Advisors/Committee Members: Jui-Han Lu (chair), Hua-Ming Chen (chair), Wen-Shyong Hsieh (chair), Chin-Hsing Chen (chair), Chung-Nan Lee (committee member), Chih-Yu Huang (chair), Wen-Shyang Chen (chair), Wen-Chung Liu (chair).

Subjects/Keywords: Microstrip antennas; Optimization; Genetic Algorithm

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Pan, C. (2006). Parameter Tuning of Microstrip Antennas Design using Genetic Algorithm. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1020106-170717

Chicago Manual of Style (16^th Edition):

Pan, Chin-Ju. “Parameter Tuning of Microstrip Antennas Design using Genetic Algorithm.” 2006. Doctoral Dissertation, NSYSU. Accessed January 23, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1020106-170717.

MLA Handbook (7^th Edition):

Pan, Chin-Ju. “Parameter Tuning of Microstrip Antennas Design using Genetic Algorithm.” 2006. Web. 23 Jan 2021.

Vancouver:

Pan C. Parameter Tuning of Microstrip Antennas Design using Genetic Algorithm. [Internet] [Doctoral dissertation]. NSYSU; 2006. [cited 2021 Jan 23]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1020106-170717.

Council of Science Editors:

Pan C. Parameter Tuning of Microstrip Antennas Design using Genetic Algorithm. [Doctoral Dissertation]. NSYSU; 2006. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1020106-170717

University of Pretoria

30. [No author]. The analysis of microstrip wire-grid antenna arrays .

Degree: 2010, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-01272010-130234/

► The design of antenna arrays involves, amongst others, the selection of the array elements and geometry, as well as the element excitations. The feeding network… (more)

▼ The design of antenna arrays involves, amongst others, the selection of the array elements and geometry, as well as the element excitations. The feeding network to obtain the desired excitations can become quite complex, and hence expensive. One possible alternative would be to make use of micros trip wire-grid antenna arrays. These arrays are composed of staggered interconnected rectangular loops of dimensions a half¬wavelength by a wavelength (in the presence of the dielectric). It is because the short sides are considered to be discrete elements fed via micros trip transmission lines, that these antennas are viewed as arrays. While considerable success has been achieved in the design of these antennas, published work has been either of an entirely experimental nature or based on approximate (albeit clever) network models which do not allow for fine control of the array element excitations or off-centre-frequency computations generally. It is the purpose of this thesis to perform an almost rigorous numerical analysis of these arrays in order to accurately predict their element excitations. Models used to study microstrip antennas range from simplified ones, such as transmission-line models up to more sophisticated and accurate integral-equation models. The mixed-potential integral equation formulation is one of these accurate models which allows for the analysis of arbitrarily shaped microstrip antennas with any combination of frequency and dielectric thickness. The model treats the antenna as a single entity so that physical effects such as radiation, surface waves, mutual coupling and losses are automatically included. According to this formulation, the microstrip antenna is modelled by an integral equation which is solved using the method of moments. By far the most demanding part of the integral equation analysis is its actual numerical implementation. For this reason a complete description of the numerical implementation of the formulation is given in this thesis. To verify the accuracy of the implementation, rectangular microstrip patch antennas were analysed and surface current distributions were shown to compare favourably with published results. The formulation is then applied to the analysis of micros trip wire-grid antenna arrays which makes it possible to accurately predict surface current distributions on these arrays. Radiation patterns are determined directly from computed current distributions in the presence of the dielectric substrate and groundplane, and are essentially exact except for finite groundplane effects. To verify theoretically predicted results for wire-grid antenna arrays, several arrays were fabricated and actual radiation patterns were measured. Good correspondence between measured and predicted co-polar radiation patterns was found, while the overall cross¬polarization behaviour in cases with large groundplanes could also be predicted. The fact that numerical experimentation can be performed on wire-grid antenna arrays to examine element excitations, means that it is now possible… Advisors/Committee Members: Prof D A McNamara (advisor).

Subjects/Keywords: Microstrip antennas; Wire-grid antenna arrays; Antenna arrays; UCTD

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

author], [. (2010). The analysis of microstrip wire-grid antenna arrays . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-01272010-130234/

Chicago Manual of Style (16^th Edition):

author], [No. “The analysis of microstrip wire-grid antenna arrays .” 2010. Masters Thesis, University of Pretoria. Accessed January 23, 2021. http://upetd.up.ac.za/thesis/available/etd-01272010-130234/.

MLA Handbook (7^th Edition):

author], [No. “The analysis of microstrip wire-grid antenna arrays .” 2010. Web. 23 Jan 2021.

Vancouver:

author] [. The analysis of microstrip wire-grid antenna arrays . [Internet] [Masters thesis]. University of Pretoria; 2010. [cited 2021 Jan 23]. Available from: http://upetd.up.ac.za/thesis/available/etd-01272010-130234/.

Council of Science Editors:

author] [. The analysis of microstrip wire-grid antenna arrays . [Masters Thesis]. University of Pretoria; 2010. Available from: http://upetd.up.ac.za/thesis/available/etd-01272010-130234/

Open Access Theses and Dissertations