Broadband Approaches And Beam Scanning Techniques For Reflectarray Antenna

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Broadband Approaches and Beam-scanning Techniques for Reflectarray Antenna

Author : Yilin Mao
Publisher :
ISBN 13 :
Total Pages : 213 pages
Book Rating : 4.:/5 (898 download)

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Book Synopsis Broadband Approaches and Beam-scanning Techniques for Reflectarray Antenna by : Yilin Mao

Download or read book Broadband Approaches and Beam-scanning Techniques for Reflectarray Antenna written by Yilin Mao and published by . This book was released on 2014 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflectarray antennas combine the numerous advantages of reflector antennas and phased array antennas and create a hybrid high-gain antenna with a low-profile, low-mass, easy-fabrication, and diversified radiation performance. However, it still has some inherent drawbacks, such as limited bandwidth and scanning range, which are targeted in this dissertation.At first, the array theory approach for radiation analysis of reflectarray antennas is described and implemented. Numerical results are then presented and compared with reference results to confirm its reliability. As the most critical influential factor to the reflectarray bandwidth, the element bandwidth was studied at first, and the effects of element shape and substrate thickness were investigated. Then, a comprehensive study was performed to investigate the bandwidth performance of reflectarrays on the system level. The effect of aperture size, element bandwidth and phase synthesis method was discussed in sequence. Particularly, a novel phase synthesis approach was proposed, which enables reflectarray to achieve a significant bandwidth improvement even with elements of narrow bandwidth. Prototypes are fabricated and tested to validate the idea. Since the reflectarray antenna is a hybrid product of reflector and phased array antennas, its main beam could be steered by either rotating its feed or reconfiguring its element phases. The former way was explored at first. An improved phase design was proposed for reflectarrays mimicing parabolic-cylindrical reflectors to expand its scanning range. The published achievements of reconfigurable reflectarrays design are reviewed and it is found that currently efficiency is a big problem. A 1-bit 10×10 reconfigurable reflectarray using PIN diode was designed, fabricated and measured to explore the energy loss, and experimental results showed that 14% efficiency could be reached. In summary, some improved designs regarding bandwidth and scanning performance for reflectarrays are proposed in this dissertation. Various factors affecting reflectarray bandwidth are investigated, which shall provide some guidelines regarding bandwidth improvement. On the other hand, two designs are presented to explore the beam scanning characteristic of reflectarray antenna, by mechanical and electrical ways respectively. Several prototypes have been fabricated and measured, demonstrating the novel features and potential applications of reflectarray antennas.

Reflectarray Antennas

Author : Payam Nayeri
Publisher : John Wiley & Sons
ISBN 13 : 1118846745
Total Pages : 426 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Reflectarray Antennas by : Payam Nayeri

Download or read book Reflectarray Antennas written by Payam Nayeri and published by John Wiley & Sons. This book was released on 2018-02-23 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides engineers with a comprehensive review of the state-of-the-art in reflectarray antenna research and development. The authors describe, in detail, design procedures for a wide range of applications, including broadband, multi-band, multi-beam, contour-beam, beam-scanning, and conformal reflectarray antennas. They provide sufficient coverage of basic reflectarray theory to fully understand reflectarray antenna design and analysis such that the readers can pursue reflectarray research on their own. Throughout the book numerous illustrative design examples including numerical and experimental results are provided. Featuring in-depth theoretical analysis along with practical design examples, em style="mso-bidi-font-style: normal;"Reflectarray Antennas is an excellent text/reference for engineering graduate students, researchers, and engineers in the field of antennas. It belongs on the bookshelves of university libraries, research institutes, and industrial labs and research facilities.

Advanced Design Methodologies and Novel Applications of Reflectarray Antennas

Author : Payam Nayeri
Publisher :
ISBN 13 :
Total Pages : 456 pages
Book Rating : 4.:/5 (829 download)

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Book Synopsis Advanced Design Methodologies and Novel Applications of Reflectarray Antennas by : Payam Nayeri

Download or read book Advanced Design Methodologies and Novel Applications of Reflectarray Antennas written by Payam Nayeri and published by . This book was released on 2012 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflectarray antennas combine the numerous advantages of printed antenna arrays and reflector antennas and create a hybrid high-gain antenna with a low-profile, low-mass, and diversified radiation performance. Reflectarrays are now emerging as the new generation of high-gain antennas for long-distance communications. In this dissertation, some advanced concepts demonstrating novel features of reflectarray antennas are presented. * First, various approaches for radiation analysis of reflectarray antennas are described and implemented. Numerical results are then presented for a variety of systems and the advantages, limitations, and accuracy of these approaches are discussed and compared with each other. * A broadband technique by using sub-wavelength elements is proposed and prototypes are fabricated and tested. This technique enables the reflectarray to achieve a significant bandwidth improvement with no additional cost. * Infrared reflectarrays antennas are studied for possible applications in concentrating solar power systems. Material losses, an important design issue at infrared frequencies, are investigated and reflectarrays consisted of dielectric resonant elements are proposed with low-loss features at infrared. * Multi-beam reflectarray antennas are studied and it is demonstrated that by optimizing the phase of the elements, a desirable multi-beam performance can be achieved using a single-feed. Local and global phase-only optimization techniques have been implemented. Two Ka-band quad-beam prototypes with symmetric and asymmetric beams have been fabricated and tested. * Different approaches for beam-scanning with reflectarray antennas are also reviewed and it is shown that for moderately wide angle beam-scanning, utilizing a feed displacement technique is more suitable than an aperture phase tuning approach. A feed displacement beam-scanning design with novel aperture phase distribution is proposed for the reflectarray antenna, and is further optimized to improve the performance. A high-gain Ka-band prototype achieving 60 degrees scan range with side-lobe levels below 15 dB is demonstrated. * The feasibility of designing reflectarray antennas on conformal surfaces is also studied numerically. A generalized analysis approach is presented and the radiation performance of reflectarray antennas on singly-curved conformal cylindrical platforms are studied and compared with their planar counterpart. It is revealed that conformal reflectarray antennas are a suitable choice for a high-gain antenna where curved platforms are required. In summary, different challenges in reflectarray analysis and design are addressed in this dissertation. On the element design challenges, bandwidth improvement and infrared operation of reflectarray antennas have been studied. On the system level challenges, multi-beam designs, beam-scanning performance, and conformal platforms have been investigated. Several prototypes have been fabricated and tested, demonstrating the novel features and potential applications of reflectarray antennas.

Reflectarray Antennas

Author : John Huang
Publisher : John Wiley & Sons
ISBN 13 : 9780470178768
Total Pages : 320 pages
Book Rating : 4.1/5 (787 download)

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Book Synopsis Reflectarray Antennas by : John Huang

Download or read book Reflectarray Antennas written by John Huang and published by John Wiley & Sons. This book was released on 2007-11-09 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the configuration and principles of a reflectarray antenna, its advantages over other antennas, the history of its development, analysis techniques, practical design procedures, bandwidth issues and wideband techniques, as well as applications and recent developments. Both authors are well respected practitioners who have build these antennas and developed them for space flight.

Reflectarray Antennas: Analysis, Design, Fabrication, and Measurement

Author : Jafar Shaker
Publisher : Artech House
ISBN 13 : 1608074994
Total Pages : 237 pages
Book Rating : 4.6/5 (8 download)

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Book Synopsis Reflectarray Antennas: Analysis, Design, Fabrication, and Measurement by : Jafar Shaker

Download or read book Reflectarray Antennas: Analysis, Design, Fabrication, and Measurement written by Jafar Shaker and published by Artech House. This book was released on 2013-11-01 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflectarray antennas refer to the class of radiating structures that are comprised of an array of radiating elements, re-radiating the energy that is impinged on them from one or more radiating feeds that are located in free space. The constituent radiators that build a reflectarray can be shaped to bring about some flexibility in the way that antenna operates such as multi band/polarization operation. The printed nature of these elements allow integration of active elements that can further enhance the functionality of the reflectarray. This allows for capabilities such as power amplification, adaptive beam shaping, and beam switching. This resource presents readers with design guidelines along with an ample amount of material on different types of reflectarrays and methods of analysis. This book begins with introductory material on reflectarray antennas and progresses to the presentation of state-of-the-art research in the field. A direct comparison with conventional reflector antennas is provided, focusing on conventional efficiency figures of reflectors. Moreover, this book offers remarks on the future direction of reflectarray research and also potential applications of the technology in face of the emergence of new fabrication techniques to accommodate both passive and active elements.

Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray

Author : Jungkyu Lee
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (813 download)

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Book Synopsis Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray by : Jungkyu Lee

Download or read book Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray written by Jungkyu Lee and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The reflectarray has been considered as a suitable candidate to replace the conventional parabolic reflectors because of its high-gain, low profile, and beam reconfiguration capability. Beam scanning capability and multi-band operation of the microstrip reflectarray have been main research topics in the reflectarray design. Narrow bandwidth of the reflectarray is the main obstacle for the various uses of the reflectarray. The wideband antenna element with a large phase variation range and a linear phase response is one of the solutions to increase the narrow bandwidth of the reflectarray. A four beam scanning reflectarray has been developed. It is the offset-fed microstrip reflectarray that has been developed to emulate a cylindrical reflector. Unlike other microstrip reflectarrays which integrates phase tuning devices such as RF MEMS switches and another phase shifters to the reflectarray elements and control the reflected phase, the beam scanning capability of the reflectarray is implemented by a phased array feed antenna. This method can reduce the complexity of the design of the beam switching reflectarray. A simple method has been investigated to develop multi-band elements in this dissertation. In approach to increase the coverage of the operation bands, a six-band reflectarray has been developed with two layers. Each layer covers three frequency bands. A Butler matrix is one of the useful beamforming networks for a phased array antenna. A Double-Sided Parallel-Strip Line (DSPSL) is adapted for the feeding network of eight array elements. The DSPSL operate very well to feed the microstrip antenna array over the bandwidth to reduce the sidelobe level and a high gain. In another topic of a Butler matrix, a dual-band Butler matrix has been proposed for multi-band applications. A modified Butler matrix is used to reduce a size and a sidelobe level. The bandwidth of the microstrip antenna is inherently small. A broadband circularly polarized microstrip antenna with dual-offset feedlines is introduced in this dissertation. Aperture-coupled feed method is used to feed the stacked patch antennas and a slotcoupled directional coupler is used for the circularly polarized operation. The research presented in this dissertation suggests useful techniques for a beam scanning microstrip reflectarray, phased array antenna, and wideband antenna designs in the modern wireless communication systems.

Beam Steerable Antennas for CubeSats

Author : Junbo Wang
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

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Book Synopsis Beam Steerable Antennas for CubeSats by : Junbo Wang

Download or read book Beam Steerable Antennas for CubeSats written by Junbo Wang and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of low-cost and lightweight CubeSats has opened up new possibilities to realize the Internet of Space (IoS), a vision that aims to establish a constellation of CubeSats in space to provide global network access. A key challenge for IoS realization is the development of beam steerable antennas that can meet the gain, bandwidth, and polarization requirements for IoS while complying with the small form factor of CubeSats. This work addresses this challenge by proposing innovative synthesis and implementation methods for reflectarrays and transmitarrays to empower low-profile wideband circularly-polarized (CP) beam steerable antennas. Two unique steerable antenna architectures are presented. The first design is a K-band mechanically steerable Risley prism antenna (RPA) constructed by two co-axially placed panels, i.e., a gradient-phase feed array (GPFA), and a gradient-phase transmitarray (GPTA). The in-plane rotation of the two panels creates beam scan that covers 0 - 360 in azimuth and 0 - 60 in elevation. To improve the CP bandwidth, a hybrid-phasing method is applied to design the GPFA, and an S-ring element unit cell is designed for the GPTA. The second design is an electronically steerable reflectarray antenna. Each unit cell can implement switches to reconfigure the connections among multiple Archimedean spiral arms, creating ``element rotation'' that leads to geometrically dependent CP phase shift. This allows the reflectarray to achieve wideband CP beam steering without any moving parts. Both antennas have been validated through prototypes and measurements to demonstrate their beam scanning capability and bandwidth potentials for CubeSat applications. Besides, a generalized design methodology for switch-reconfigured unit cells (SRUC) to achieve the maximum phase resolution is established. It applies binary particle swarm optimization (BPSO) algorithm to optimize the topology of pixelated unit cells with embedded switches. Unconventional linearly-polarized (LP) and CP 2-switch 4-state SRUC for K-band beam steerable reflectarrays have been designed and thoroughly validated. Lastly, the novel charge-programmed multi-material (CPMM) additive manufacturing technology is applied to innovate antenna design and fabrication. Several ultra-lightweight CP transmitarrays achieving order-of-magnitude weight reduction and a compact CP horn antenna with uniquely designed 3D structures have been manufactured and measured. This dissertation addresses the cutting edges of CubeSat beam steerable antennas from several aspects, including the fundamental principles, synthesis methods, antenna architectures, and manufacturing methods.

Investigation of Methods of Scanning the Beam of Large Antennas

Author : Stanford Research Institute
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (361 download)

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Book Synopsis Investigation of Methods of Scanning the Beam of Large Antennas by : Stanford Research Institute

Download or read book Investigation of Methods of Scanning the Beam of Large Antennas written by Stanford Research Institute and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Dual-band Beam Scanning Reflectarrays and Novel Wideband and Polarization Diversified Planar Antennas

Author : Shih-Hsun Hsu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (69 download)

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Book Synopsis Dual-band Beam Scanning Reflectarrays and Novel Wideband and Polarization Diversified Planar Antennas by : Shih-Hsun Hsu

Download or read book Dual-band Beam Scanning Reflectarrays and Novel Wideband and Polarization Diversified Planar Antennas written by Shih-Hsun Hsu and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The reflectarray antenna has been considered as a suitable candidate to replace the traditional parabolic reflectors because of its high-gain and low-profile features. Beam scanning capability and multi-band operation are the current trends of the reflectarray design. It is desired to implement these functionalities with simple and effective techniques. Narrow bandwidth is the main issue which restricts the applications of the microstrip antennas. New microstrip slot antennas and polarization diversified planar antennas are introduced as the solutions to the issue of narrow bandwidth in this dissertation. A dual-band beam scanning reflectarray has been developed. It is the first offset-fed reflectarray that has been ever practically developed to emulate a cylindrical/parabolic type of reflector. Unlike other beam scanning reflectarrays which integrate phase tuning devices into the reflectarray elements and control the reflection phase, the beam scanning capability of this reflectarray is provided by its feed array. This method significantly reduces the complexity of the design of the beam scanning reflectarray. A new dual-band reflectarray configuration is also developed to eliminate the possible top layer blocking effects in the dual-layer reflectarray configuration. Perforated patches loaded with slots on the ground plane and rectangular patches loaded with slots on the patches are adopted as the low and high frequency bands, respectively. It is guaranteed that no physical contact between any two elements will occur. The bandwidth of the conventional microstrip antenna is small. A new wideband circularly polarized microstrip slot antenna is introduced in this dissertation. Very wide 3-dB axial ratio bandwidth is observed for the proposed antenna. The antennas are assembled in triangularly arranged array with sequential rotation feed technique. Polarization polarity is an alternative solution to the narrow bandwidth. A reconfigurable circularly polarized microstrip antenna is proposed. The antenna has both right-hand and left-hand circular polarizations which are controlled by two piezoelectric transducers. In addition, a dual-band dual-linearly-polarized planar array is designed based on the concepts of polarization diversity and multi-band operation. The research presented in this dissertation suggests useful techniques for reflectarrays and novel antenna designs. The results should have many applications for the modern wireless communication and radar systems.

Investigation of Methods of Scanning the Beam of Large Antennas

Author : M. Gilden
Publisher :
ISBN 13 : 9781258666347
Total Pages : 62 pages
Book Rating : 4.6/5 (663 download)

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Book Synopsis Investigation of Methods of Scanning the Beam of Large Antennas by : M. Gilden

Download or read book Investigation of Methods of Scanning the Beam of Large Antennas written by M. Gilden and published by . This book was released on 2013-04 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering The Period September 1 To November 30, 1959. SRI Project No. 2184.

Handbook of Metamaterial-Derived Frequency Selective Surfaces

Author : Shiv Narayan
Publisher : Springer Nature
ISBN 13 : 9811664412
Total Pages : 744 pages
Book Rating : 4.8/5 (116 download)

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Book Synopsis Handbook of Metamaterial-Derived Frequency Selective Surfaces by : Shiv Narayan

Download or read book Handbook of Metamaterial-Derived Frequency Selective Surfaces written by Shiv Narayan and published by Springer Nature. This book was released on 2023-01-02 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a consolidated reference for the applications of frequency selective surfaces (FSS) technology in different sectors such as wireless communications, smart buildings, microwave and medical industries. It covers all aspects of metamaterial FSS technology starting from theoretical simulation, fabrication and measurement all the way to actual hardware implementation. Also included are in-depth discussions on the design methodologies of metamaterial FSS structures and their practical implementation in devices and components. It will be of interest to researchers and engineers working on developing metamaterial-FSS technology.

Investigation of Methods of Scanning the Beam of Large Antennas

Author : M. G. ANDREASEN
Publisher :
ISBN 13 :
Total Pages : 1 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Investigation of Methods of Scanning the Beam of Large Antennas by : M. G. ANDREASEN

Download or read book Investigation of Methods of Scanning the Beam of Large Antennas written by M. G. ANDREASEN and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study on wire-grid HF lens antennas is a new research topic that shows great promise. A theoretical and experimental investigation is presented of the properties of a wire grid placed above a ground plane. A general theoretical investigation on a radial horn with arbitrarily variable flare angle showed that the connection of a radial horn to the rim of a circular lens had a very minor effect upon the ideal radiation pattern of the lens, and that the reflection at the rim of the lens was also very small. A new type of electrically variable phase shifter was analyzed and demonstrated experimentally. Items also investigated included: (1) mutual coupling effects in scanning antenna arrays, (2) reduction of the number of elements in an array, (3) a corrected line source feed for a spherical reflector, (4) the compound interferometer as a possible radar antenna, (5) linear arrays with unequal element spacing, (6) a toroidal-band line-source scanner, (7) various types of electronic phase shifters, and (8) lownoise parametric amplifi55 . (Author).

Antenna Engineering Handbook

Author : John Volakis
Publisher : McGraw Hill Professional
ISBN 13 : 1259644707
Total Pages : 1424 pages
Book Rating : 4.2/5 (596 download)

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Book Synopsis Antenna Engineering Handbook by : John Volakis

Download or read book Antenna Engineering Handbook written by John Volakis and published by McGraw Hill Professional. This book was released on 2018-11-05 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gold-standard reference on the design and application of classic and modern antennas—fully updated to reflect the latest advances and technologiesThis new edition of the “bible of antenna engineering” has been updated to provide start-to-finish coverage of the latest innovations in antenna design and application. You will find in-depth discussion of antennas used in modern communication systems, mobile and personal wireless technologies, satellites, radar deployments, flexible electronics, and other emerging technologies, including 5G, terahertz, and wearable electronics. Antenna Engineering Handbook, Fifth Edition, is bolstered by real-world examples, hundreds of illustrations, and an emphasis on the practical aspects of antennas.Featuring 60 chapters and contributions from more than 80 renowned experts, this acclaimed resource is edited by one of the world’s leading antenna authorities. This edition features all of the classic antenna types, plus new and emerging designs, with 13 all-new chapters and important updates to nearly all chapters from past editions.Antenna Engineering Handbook, Fifth Edition, clearly explains cutting-edge applications in WLANs, automotive systems, PDAs, and handheld devices, making it an indispensable companion for today’s antenna practitioners and developers.Coverage includes:•Antenna basics and classic antennas•Design approaches for antennas and arrays•Wideband and multiband antennas•Antennas for mobile devices and PDAs, automotive applications, and aircraft•Base station and smart antennas•Beamforming and 5G antennas•Millimeter-wave and terahertz antennas•Flexible, wearable, thin film, origami, dielectric, and on-chip antennas•MIMO antennas and phased arrays•Direction-finding and GPS antennas•Active antennas•Low-profile wideband antennas•Nanoantennas•Reflectors and other satellite and radio-telescope antennas•Low-frequency, HF, VHF, UHF, ECM, and ESM antennas•Impedance-matching techniques and material characteristics•Metastructured and frequency selective surfaces•Propagation and guided structures•Computational techniques and toolsets•Indoor and outdoor measurements

Aperture Antennas for Millimeter and Sub-Millimeter Wave Applications

Author : Artem Boriskin
Publisher : Springer
ISBN 13 : 3319627732
Total Pages : 494 pages
Book Rating : 4.3/5 (196 download)

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Book Synopsis Aperture Antennas for Millimeter and Sub-Millimeter Wave Applications by : Artem Boriskin

Download or read book Aperture Antennas for Millimeter and Sub-Millimeter Wave Applications written by Artem Boriskin and published by Springer. This book was released on 2017-09-05 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the technology of millimetre waves and Terahertz (THz) antennas. It highlights the importance of moderate and high-gain aperture antennas as key devices for establishing point-to-point and point-to-multipoint radio links for far-field and near-field applications, such as high data-rate communications, intelligent transport, security imaging, exploration and surveillance systems. The book provides a comprehensive overview of the key antenna technologies developed for the mm wave and THz domains, including established ones – such as integrated lens antennas, advanced 2D and 3D horn antennas, transmit and reflect arrays, and Fabry-Perot antennas – as well as emerging metasurface antennas for near-field and far-field applications. It describes the pros and cons of each antenna technology in comparison with other available solutions, a discussion supplemented by practical examples illustrating the step-by-step implementation procedures for each antenna type. The measurement techniques available at these frequency ranges are also presented to close the loop of the antenna development cycle. In closing, the book outlines future trends in various antenna technologies, paving the way for further developments. Presenting content originating from the five-year ESF research networking program ‘Newfocus’ and co-authored by the most active and highly cited research groups in the domain of mm- and sub-mm-wave antenna technologies, the book offers a valuable guide for researchers and engineers in both industry and academia.

Analysis and Design of Transmitarray Antennas

Author : Ahmed H. Abdelrahman
Publisher : Morgan & Claypool Publishers
ISBN 13 : 1627057064
Total Pages : 177 pages
Book Rating : 4.6/5 (27 download)

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Book Synopsis Analysis and Design of Transmitarray Antennas by : Ahmed H. Abdelrahman

Download or read book Analysis and Design of Transmitarray Antennas written by Ahmed H. Abdelrahman and published by Morgan & Claypool Publishers. This book was released on 2017-01-18 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, transmitarray antennas have attracted growing interest with many antenna researchers. Transmitarrays combines both optical and antenna array theory, leading to a low profile design with high gain, high radiation efficiency, and versatile radiation performance for many wireless communication systems. In this book, comprehensive analysis, new methodologies, and novel designs of transmitarray antennas are presented. Detailed analysis for the design of planar space-fed array antennas is presented. The basics of aperture field distribution and the analysis of the array elements are described. The radiation performances (directivity and gain) are discussed using array theory approach, and the impacts of element phase errors are demonstrated. The performance of transmitarray design using multilayer frequency selective surfaces (M-FSS) approach is carefully studied, and the transmission phase limit which are generally independent from the selection of a specific element shape is revealed. The maximum transmission phase range is determined based on the number of layers, substrate permittivity, and the separations between layers. In order to reduce the transmitarray design complexity and cost, three different methods have been investigated. As a result, one design is performed using quad-layer cross-slot elements with no dielectric material and another using triple-layer spiral dipole elements. Both designs were fabricated and tested at X-Band for deep space communications. Furthermore, the radiation pattern characteristics were studied under different feed polarization conditions and oblique angles of incident field from the feed. New design methodologies are proposed to improve the bandwidth of transmitarray antennas through the control of the transmission phase range of the elements. These design techniques are validated through the fabrication and testing of two quad-layer transmitarray antennas at Ku-band. A single-feed quad-beam transmitarray antenna with 50 degrees elevation separation between the beams is investigated, designed, fabricated, and tested at Ku-band. In summary, various challenges in the analysis and design of transmitarray antennas are addressed in this book. New methodologies to improve the bandwidth of transmitarray antennas have been demonstrated. Several prototypes have been fabricated and tested, demonstrating the desirable features and potential new applications of transmitarray antennas.

Space Antenna Handbook

Author : William A. Imbriale
Publisher : John Wiley & Sons
ISBN 13 : 1119993199
Total Pages : 772 pages
Book Rating : 4.1/5 (199 download)

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Book Synopsis Space Antenna Handbook by : William A. Imbriale

Download or read book Space Antenna Handbook written by William A. Imbriale and published by John Wiley & Sons. This book was released on 2012-06-25 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses a broad range of topics on antennas for space applications. First, it introduces the fundamental methodologies of space antenna design, modelling and analysis as well as the state-of-the-art and anticipated future technological developments. Each of the topics discussed are specialized and contextualized to the space sector. Furthermore, case studies are also provided to demonstrate the design and implementation of antennas in actual applications. Second, the authors present a detailed review of antenna designs for some popular applications such as satellite communications, space-borne synthetic aperture radar (SAR), Global Navigation Satellite Systems (GNSS) receivers, science instruments, radio astronomy, small satellites, and deep-space applications. Finally it presents the reader with a comprehensive path from space antenna development basics to specific individual applications. Key Features: Presents a detailed review of antenna designs for applications such as satellite communications, space-borne SAR, GNSS receivers, science instruments, small satellites, radio astronomy, deep-space applications Addresses the space antenna development from different angles, including electromagnetic, thermal and mechanical design strategies required for space qualification Includes numerous case studies to demonstrate how to design and implement antennas in practical scenarios Offers both an introduction for students in the field and an in-depth reference for antenna engineers who develop space antennas This book serves as an excellent reference for researchers, professionals and graduate students in the fields of antennas and propagation, electromagnetics, RF/microwave/millimetrewave systems, satellite communications, radars, satellite remote sensing, satellite navigation and spacecraft system engineering, It also aids engineers technical managers and professionals working on antenna and RF designs. Marketing and business people in satellites, wireless, and electronics area who want to acquire a basic understanding of the technology will also find this book of interest.

Electromagnetic Vortices

Author : Zhi Hao Jiang
Publisher : John Wiley & Sons
ISBN 13 : 1119662826
Total Pages : 498 pages
Book Rating : 4.1/5 (196 download)

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Book Synopsis Electromagnetic Vortices by : Zhi Hao Jiang

Download or read book Electromagnetic Vortices written by Zhi Hao Jiang and published by John Wiley & Sons. This book was released on 2021-12-29 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the most recent advances in electromagnetic vortices In Electromagnetic Vortices: Wave Phenomena and Engineering Applications, a team of distinguished researchers delivers a cutting-edge treatment of electromagnetic vortex waves, including their theoretical foundation, related wave properties, and several potentially transformative applications. The book is divided into three parts. The editors first include resources that describe the generation, sorting, and manipulation of vortex waves, as well as descriptions of interesting wave behavior in the infrared and optical regimes with custom-designed nanostructures. They then discuss the generation, multiplexing, and propagation of vortex waves at the microwave and millimeter-wave frequencies. Finally, the selected contributions discuss several representative practical applications of vortex waves from a system perspective. With coverage that incorporates demonstration examples from a wide range of related sub-areas, this essential edited volume also offers: Thorough introductions to the generation of optical vortex beams and transformation optical vortex wave synthesizers Comprehensive explorations of millimeter-wave metasurfaces for high-capacity and broadband generation of vector vortex beams, as well as orbital angular momentum (OAM) detection and its observation in second harmonic generations Practical discussions of microwave SPP circuits and coding metasurfaces for vortex beam generation and OAM-based structured radio beams and their applications In-depth examinations and explorations of OAM multiplexing for wireless communications, wireless power transmission, as well as quantum communications and simulations Perfect for students of wireless communications, antenna/RF design, optical communications, and nanophotonics, Electromagnetic Vortices: Wave Phenomena and Engineering Applications is also an indispensable resource for researchers in academia, at large defense contractors, and in government labs.