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Author : Sofian Hamid
Publisher :
ISBN 13 : 9783985550319
Total Pages : pages
Book Rating : 4.5/5 (53 download)
Download or read book Lossy Dielectric Resonators for Microwave Absorber and Antenna Applications written by Sofian Hamid and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Laila K. Hady
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (747 download)
Download or read book Multi-functional Use of Cylindrical Dielectric Resonator for Microwave Circuits and Antenna Applications written by Laila K. Hady and published by . This book was released on 2009 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this PhD dissertation is to investigate the ability of utilizing a single cylindrical dielectric resonator in realizing multi-functional devices to be used for filtering, oscillating as well as radiating purposes by exciting multi-independent modes simultaneously. The complete work is devoted in three main categories or contributions. First contribution is mainly working on the use of dielectric resonators in multi-function realizations. A design of dielectric resonator antenna in a polarization filtering cavity for dual function applications is studied where a cylindrical dielectric resonator is enclosed by a hypothetical resonant cavity that acts as a shielding for the resonating mode while transparent for the radiating mode. A possible application of this device is a receiving antenna at the frequency of the radiating mode and can incorporate a local oscillator operating at the resonant frequency of the resonating mode. Moreover, a design of dielectric resonator antenna for GPS and WLAN applications is introduced where both a broadside circularly-polarized antenna and an omni-directional antenna are obtained simultaneously by exciting two independent modes. Since the previous work dealt with the dual use of a dielectric resonator, a new challenge was to go for the triplet functioning. Therefore, part of the work is devoted to study the triple mode operation using a single dielectric resonator for filtering and radiating purposes. The design utilized the dielectric resonator simultaneously as a dual band radiator and as a filter operating for the lower frequency radiating mode band. Traditionally, mechanical direction finding antennas were built with either loop or dipole antenna elements. In radar applications, spiral and horn antennas have been used for the precision direction finding. The second contribution of this dissertation work is studying the use of dielectric resonator antennas in the design of direction finding systems. The direction finding operation is achieved by comparing the received signal with the two generated dielectric resonator antenna patterns. Those patterns are obtained by exciting certain mode through two different ports, once out of phase and once in phase, to produce a broadside type and a monopole type of radiation patterns. Because of its small size, the DRA can be used for an approximate hand-held target tracking, but it could also be used as a feed for reflector antenna for an accurate direction finding in point-to-point applications. The intended application of this antenna is to track a position of a source of radiation. Since the previous parts of the dissertation work are mainly all about the implementation of multi-functional devices with a single dielectric resonator, it was of interest to investigate the use of higher order modes and explore the ability of incorporating such modes in the implementation of new microwave devices. Cylindrical dielectric resonators sustain high-Q electromagnetic modes called "Whispering Gallery Modes" (WGMs). Such high order modes have attracted the attention due to their intensive applications in quantum electrodynamics (QEM), photonics, and telecommunications. The third contribution of this dissertation is mainly studying the ability to excite a WGM transverse magnetic type of mode and use it for the realization of an equally distributed power dividers to be used later in the feeding of antenna array. An X-band WGM excited dielectric resonator enclosed by a cylindrical cavity was designed built and measured to perform as a 5-way uniformly distributed power divider. The excitation of the transverse magnetic WGH 3,1,1 mode was carried out by using microstrip feeding technology integrated with electric probe coupling technique or magnetic slot coupling for different design realizations.
Author : Sally J. Nauman
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.3/5 (91 download)
Download or read book Microwave Dielectric Resonators written by Sally J. Nauman and published by . This book was released on 1965 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resonant frequencies for the fundamental modes in circular cylindrical and rectangular parallelopiped high dielectric resonators have been calculated by computer for a range of values of physical dimensions and relative dielectric constant. The frequency range extends from zero to 50,000 Mc/sec, the relative dielectric constant from 50 to 1800, and physical dimensions from zero to 500 mils. Results are presented in tabular and graphical form with frequency plotted versus resonator length for parametric values of relative dielectric constant and cross sectional dimensions. A brief review of earlier work with high dielectric resonators is included. Expressions for the resonant frequency and fundamental mode field configurations are given. (Author).
Author : Darko Kajfez
Publisher : Noble Publishing
ISBN 13 : 9781884932052
Total Pages : 547 pages
Book Rating : 4.9/5 (32 download)
Download or read book Dielectric Resonators written by Darko Kajfez and published by Noble Publishing. This book was released on 1998-01-01 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the definite reference text on dielectric resonators used in filters and oscillators. This second edition includes corrections and updates, a new chapter on how to use the program included on a new disk. Sections are devoted to properties of materials, coupling techniques and filter and oscillator design using dielectric resonators. Programs implement the models presented in the book and identify the frequencies of all the modes. Author's Comments After the first publication of Dielectric Resonators by Artech House ran out of print, the book was reprinted by Vector Forum, and that version is also out of print now. As the book has become a popular reference for microwave and RF engineers, it is hoped that the present second edition will be just as useful. No matter what the major use of dielectric resonators will be in the future, the prerequisite for an intelligent application is an understanding of the basic principles of these devices. This book aims to provide that understanding. Publisher's Comments With renewed interest in dielectric resonator technology for modern wireless communications equipment, this book is an excellent reference for its understanding and application. The accompanying programs provided on disk implement the models presented in the book and identify the frequencies of all resonance modes
Author : Lyudmila B. Minakova
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (742 download)
Download or read book The Effects of Resonance Energy Absorption in Lossy Waveguide-Dielectric Resonators written by Lyudmila B. Minakova and published by . This book was released on 2002 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of a half and total resonance absorption of the input power are studied with the developed qualitative theory and exact numerical models for the case of waveguide-dielectric resonators built on e-plane rectangular lossy-dielectric posts in a rectangular waveguide.
Author : B. E. Spielman
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (227 download)
Download or read book Dielectric Resonators for Use in Microwave and Millimeter-Wave GaAs Circuits written by B. E. Spielman and published by . This book was released on 1983 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report represents the results of an investigation of dielectric resonators to be processed in GaAs substrates for application to microwave and millimeter-wave monolithic integrated circuits. Zeroth-and first order analyses are described. These analyses are applied to dielectric resonator structures to be formed in GaAs substrate material by etching an annular gap in the substrate, thereby effectively leaving a circular cylindrical disc of dielectric material to function as a resonator. Plots of geometric parameter variations with frequency are provided for these resonator structures. Tables are presented to show specific resonant structures for frequency-scaled microwave and non-scaled millimeter-wave resonators. Results are discussed, conclusions drawn, and suggestions for further work set forth. (Author).
Author : Ben A. Munk
Publisher : John Wiley & Sons
ISBN 13 : 0471723762
Total Pages : 442 pages
Book Rating : 4.4/5 (717 download)
Download or read book Frequency Selective Surfaces written by Ben A. Munk and published by John Wiley & Sons. This book was released on 2005-03-11 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: "...Ben has been the world-wide guru of this technology, providing support to applications of all types. His genius lies in handling the extremely complex mathematics, while at the same time seeing the practical matters involved in applying the results. As this book clearly shows, Ben is able to relate to novices interested in using frequency selective surfaces and to explain technical details in an understandable way, liberally spiced with his special brand of humor... Ben Munk has written a book that represents the epitome of practical understanding of Frequency Selective Surfaces. He deserves all honors that might befall him for this achievement." -William F. Bahret. Mr. W. Bahret was with the United States Air Force but is now retired. From the early 50s he sponsored numerous projects concerning Radar Cross Section of airborne platforms in particular antennas and absorbers. Under his leadership grew many of the concepts used extensively today, as for example the metallic radome. In fact, he is by many considered to be the father of stealth technology. "This book compiles under one cover most of Munk's research over the past three decades. It is woven with the physical insight that he has gained and further developed as his career has grown. Ben uses mathematics to whatever extent is needed, and only as needed. This material is written so that it should be useful to engineers with a background in electromagnetics. I strongly recommend this book to any engineer with any interest in phased arrays and/or frequency selective surfaces. The physical insight that may be gained from this book will enhance their ability to treat additional array problems of their own." -Leon Peters, Jr. Professor Leon Peters, Jr., was a professor at the Ohio State University but is now retired. From the early sixties he worked on, among many other things, RCS problems involving antennas and absorbers. This book presents the complete derivation of the Periodic Method of Moments, which enables the reader to calculate quickly and efficiently the transmission and reflection properties of multi-layered Frequency Selective Surfaces comprised of either wire and/or slot elements of arbitrary shape and located in a stratified medium. However, it also gives the reader the tools to analyze multi-layered FSS's leading to specific designs of the very important Hybrid Radome, which is characterized by constant band width with angle of incidence and polarization. Further, it investigates in great detail bandstop filters with large as well as narrow bandwidth (dichroic surfaces). It also discusses for the first time, lossy elements used in producing Circuit Analog absorbers. Finally, the last chapter deals with power breakdown of FSS's when exposed to pulsed signals with high peak power. The approach followed by most other presentations simply consists of expanding the fields around the FSS, matching the boundary conditions and writing a computer program. While this enables the user to obtain calculated results, it gives very little physical insight and no help in how to design actual multi-layered FSS's. In contrast, the approach used in this title analyzes all curves of desired shapes. In particular, it discusses in great detail how to produce radomes made of FSS's located in a stratified medium (Hybrid Radomes), with constant band width for all angles of incidence and polarizations. Numerous examples are given of great practical interest. More specifically, Chapter 7 deals with the theory and design of bandpass radomes with constant bandwidth and flat tops. Examples are given for mono-, bi- and tri-planar designs. Chapter 8 deals with bandstop filters with broad as well as narrow bandwidth. Chapter 9 deals with multi-layered FSS of lossy elements, namely the so-called Circuit Analog Absorbers, designed to yield outstanding absorption with more than a decade of bandwidth. Features material previously labeled as classified by the United States Air Force.
Author : Yuping Duan
Publisher : CRC Press
ISBN 13 : 1315341034
Total Pages : 382 pages
Book Rating : 4.3/5 (153 download)
Download or read book Microwave Absorbing Materials written by Yuping Duan and published by CRC Press. This book was released on 2016-10-14 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the phenomenal development of electromagnetic wave communication devices and stealth technology, electromagnetic wave absorbing materials have been attracting attention as antielectromagnetic interference slabs, stealth materials, self-concealing technology, and microwave darkrooms. This book starts with the fundamental theory of electromagnetic wave absorption in loss medium space, followed by a discussion of different microwave absorbents, such as manganese dioxide, iron-based composite powder, conductive polyaniline, barium titanate powder, and manganese nitride. Then, structural absorbing materials are explored, including multilayer materials, new discrete absorbers, microwave absorption coatings, cement-based materials, and structural pyramid materials. Many of the graphics demonstrate not only the principles of physics and experimental results but also the methodology of computing. The book will be useful for graduate students of materials science and engineering, physics, chemistry, and electrical and electronic engineering; researchers in the fields of electromagnetic functional materials and nanoscience; and engineers in the fields of electromagnetic compatibility and stealth design.
Author : 曾昱瑋
Publisher :
ISBN 13 :
Total Pages : 123 pages
Book Rating : 4.:/5 (87 download)
Download or read book Development and Applications of Low-Loss Microwave Dielectric Resonators written by 曾昱瑋 and published by . This book was released on 2013 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ricardo Marqués
Publisher : John Wiley & Sons
ISBN 13 : 1118211561
Total Pages : 274 pages
Book Rating : 4.1/5 (182 download)
Download or read book Metamaterials with Negative Parameters written by Ricardo Marqués and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first general textbook to offer a complete overview of metamaterial theory and its microwave applications Metamaterials with Negative Parameters represents the only unified treatment of metamaterials available in one convenient book. Devoted mainly to metamaterials that can be characterized by a negative effective permittivity and/or permeability, the book includes a wide overview of the most important topics, scientific fundamentals, and technical applications of metamaterials. Chapter coverage includes: the electrodynamics of left-handed media, synthesis of bulk metamaterials, synthesis of metamaterials in planar technology, microwave applications of metamaterial concepts, and advanced and related topics, including SRR- and CSRR-based admittance surfaces, magneto- and electro-inductive waves, and sub-diffraction imaging devices. A list of problems and references is included at the end of each chapter, and a bibliography offers a complete, up-to-daterepresentation of the current state of the art in metamaterials. Geared toward students and professionals alike, Metamaterials with Negative Parameters is an ideal textbook for postgraduate courses and also serves as a valuable introductory reference for scientists and RF/microwave engineers.
Author : Long Li
Publisher : Springer Nature
ISBN 13 : 9819979145
Total Pages : 526 pages
Book Rating : 4.8/5 (199 download)
Download or read book Electromagnetic Metamaterials and Metasurfaces written by Long Li and published by Springer Nature. This book was released on 2024 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this book is the fast-developing area of research known as metamaterials/metasurfaces and some of their engineering applications. This book comprehensively presents the state of the art of metamaterials/metasurfaces from theory to applications. The theoretical side includes electrodynamics of left-handed medium, generalized Snell's law, digital coding metamaterials/metasurfaces, group theory of metamaterials, information metamaterials and metasurfaces, etc. On the application side, a wide range of design examples are discussed, including metamaterial antennas, electromagnetic interference, frequency selective surfaces, wireless power transmission and energy harvesting, cloaking and radar cross section reduction, orbital angular momentum, wireless communication, imaging, etc. The book provides researchers, engineers, and graduate students with a variety of new discoveries, results, information, and knowledge in the field of metamaterials and metasurfaces.
Author : Josep Canet-Ferrer
Publisher : BoD – Books on Demand
ISBN 13 : 1789848423
Total Pages : 204 pages
Book Rating : 4.7/5 (898 download)
Download or read book Metamaterials and Metasurfaces written by Josep Canet-Ferrer and published by BoD – Books on Demand. This book was released on 2019-01-03 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metamaterials have provided applications in spectral ranges covering radio frequencies and ultraviolet. However, most applications have been extrapolated to the visible or near-infrared after being developed at the GHz level. This is due to technological reasons since fabrication of microwave antennas is not as demanding as THz resonators or plasmonic nanostructures. Accordingly, this book has been divided into three parts. In the first part, fundamentals of metamaterials and metadevices are discussed, while describing recent advances in the field. In the second part, the discussion is extended to the different spectral ranges focusing on the strategies for enabling the reconfigurability of metadevices. Given the increasing interest in THz applications, these can be found in the third part.
Author :
Publisher :
ISBN 13 :
Total Pages : 880 pages
Book Rating : 4.3/5 (55 download)
Download or read book IEEE Transactions on Microwave Theory and Techniques written by and published by . This book was released on 1953 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Willie J. Padilla
Publisher : Morgan & Claypool Publishers
ISBN 13 : 1636392601
Total Pages : 199 pages
Book Rating : 4.6/5 (363 download)
Download or read book Metamaterial Electromagnetic Wave Absorbers written by Willie J. Padilla and published by Morgan & Claypool Publishers. This book was released on 2022-01-24 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic metamaterials are a family of shaped periodic materials which achieve extraordinary scattering properties that are difficult or impossible to achieve with naturally occurring materials. This book focuses on one such feature of electromagnetic metamaterials—the theory, properties, and applications of the absorption of electromagnetic radiation. We have written this book for undergraduate and graduate students, researchers, and practitioners, covering the background and tools necessary to engage in the research and practice of metamaterial electromagnetic wave absorbers in various fundamental and applied settings. Given the growing impact of climate change, the call for innovations that can circumvent the use of conventional energy sources will be increasingly important. As we highlight in Chapter 6, the absorption of radiation with electromagnetic metamaterials has been used for energy harvesting and energy generation, and will help to reduce reliance on fossil fuels. Other applications ranging from biochemical sensing to imaging are also covered. We hope this book equips interested readers with the tools necessary to successfully engage in applied metamaterials research for clean, sustainable energy. This book consists of six chapters. Chapter 1 provides an introduction and a brief history of electromagnetic wave absorbers; Chapter 2 focuses on several theories of perfect absorbers; Chapter 3 discusses the scattering properties achievable with metamaterial absorbers; Chapter 4 provides significant detail on the fabricational processes; Chapter 5 discusses examples of dynamical absorbers; and Chapter 6 highlights applications of metamaterial absorbers.
Author :
Publisher :
ISBN 13 :
Total Pages : 980 pages
Book Rating : 4.F/5 ( download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Valerio Lucarini
Publisher : Springer
ISBN 13 : 3540273166
Total Pages : 165 pages
Book Rating : 4.5/5 (42 download)
Download or read book Kramers-Kronig Relations in Optical Materials Research written by Valerio Lucarini and published by Springer. This book was released on 2005-08-01 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: TheKramers-Kronigrelationsconstitutethemathematicalformulationofthe fundamental connection between the in-phase to the out-of-phase response of a system to a sinusoidal time-varying external perturbation. Such connection exists in both classical and quantum physical systems and derives directly from the principle of causality. Apart from being of great importance in high energy physics, statistical physics, and acoustics, at present the Kramers-Kronig relations are basic and widely-accepted tools for the investigation of the linear optical properties of materials, since they allow performing the so-called inversion of optical data, i.e. acquiring knowledge on dispersive phenomena by measurements of absorptive phenomena over the whole energy spectrum or vice versa. Since the late ’80s, a growing body of theoretical results as well as of experimental evidences has shown that the Kramers-Kronig relations can be adopted for e?ciently acquiring knowledge on nonlinear optical phenomena. These results suggest that the Kramers-Kronig relations may become in a near future standard techniques in the context of nonlinear spectroscopy. Thisbookisthe?rstcomprehensivetreatisedevotedtoprovidingauni- ing picture of the physical backgrounds, of the rigorous mathematical theory, and of the applications of the Kramers-Kronig relations in both ?elds of l- ear and nonlinear optical spectroscopy. Some basic programs written for the 1 MATLAB environment are also included. This book is organized as an argumentative discourse, progressing from the linear to the nonlinear phenomena, from the general to the speci?c s- tems, and from the theoretical to the experimental results.
Author : Ahmed Kishk
Publisher : BoD – Books on Demand
ISBN 13 : 1839696680
Total Pages : 286 pages
Book Rating : 4.8/5 (396 download)
Download or read book Recent Topics in Electromagnetic Compatibility written by Ahmed Kishk and published by BoD – Books on Demand. This book was released on 2022-02-23 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Topics in Electromagnetic Compatability discusses several topics in electromagnetic compatibility (EMC) and electromagnetic interference (EMI), including measurements, shielding, emission, interference, biomedical devices, and numerical modeling. Over five sections, chapters address the electromagnetic spectrum of corona discharge, life cycle assessment of flexible electromagnetic shields, EMC requirements for implantable medical devices, analysis and design of absorbers for EMC applications, artificial surfaces, and media for EMC and EMI shielding, and much more.
