Download or read book Propagation Constants for a Type of Leaky Wave Antenna written by Ting-wei Tang and published by . This book was released on 1961 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Leaky Wave Antennas Using the Matrix Pencil Method written by Amardeep Singh and published by . This book was released on 2015 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The leaky-wave antenna (LWA) is a traveling wave antenna that uses a fast wave as the main radiating mechanism, where the fast wave is radiating continuously along the structure. Depending on the length of the antenna, some part of the fast wave gets reflected from the end and causes another beam in the opposite direction. The effects of the reflected fast wave on the radiation pattern can be analyzed if the reflection coefficient at the end of the antenna is known, which can be obtained from the complex amplitude and propagation constants associated with the fast waves. Even the radiation pattern of a LWA can be obtained using the reflection coefficient and propagation constants. Closed top guiding structures, a dielectric slab waveguide, 2-D LWAs and 3-D LWAs are modeled in a commercial full wave MoM solver, FEKO. The near-field samples are calculated along the structure. For these types of structures, the total near field can be expressed as a sum of complex exponentials. The matrix pencil method (MPM) is a most accurate and efficient linear technique to approximate a function by a sum of complex exponentials. The exponential components from the total near field use the complex propagation constants inside the structure, which are calculated using the MPM. The MPM extracted amplitude and phase components are used to calculate the reflection coefficients of the structures and radiation patterns of the LWAs. The accuracy of this approach is verified using various open and closed guiding structures in 2-D and 3-D, and by comparing the results with available numerical and experimental results.
Download or read book A Trough Leaky wave Antenna written by Carlos Alberto Jaramillo and published by . This book was released on 2009 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation from Variable reactance Surface wave Antennas written by M. G. Andreasen and published by . This book was released on 1961 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical study is presented of the properties of flush-mounted or wo-sided ariablereac ance surface-wave a tennas. he paradox of radiation from a constant-reactance surfacewave antenna is discussed also in order to derive an understanding of the principle of radiati n from a surface-wave antenna with periodicallly varying parameters. The principle of radiation from Simon's cigar a tenna which has caused some controversy, is discussed. Finally, a theory, which i in principle exact, is developed for a variable-reactance surface-wave a tenna. By this theory, the surface field can be determined using a field representation in terms of couples cylindrical mode . For practical designs approximate expre sions for the surface field are derived. (author).
Download or read book Antenna Theory and Design written by Warren L. Stutzman and published by John Wiley & Sons. This book was released on 2012-05-22 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stutzman's 3rd edition of Antenna Theory and Design provides a more pedagogical approach with a greater emphasis on computational methods. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational changes to improve understanding; more details to selected important topics such as microstrip antennas and arrays; and expanded measurements topic.
Download or read book Theory of Thin Dielectric Cover on Slitted Rectangular Waveguide Antenna written by S. Nishida and published by . This book was released on 1959 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IRE Transactions on Antennas and Propagation written by Institute of Radio Engineers. Professional Group on Antennas and Propagation and published by . This book was released on 1961 with total page 1432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IRE Transactions on Antennas and Propagation written by and published by . This book was released on 1958 with total page 1358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstrip and Printed Antennas written by Debatosh Guha and published by John Wiley & Sons. This book was released on 2011-02-02 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on new techniques, analysis, applications and future trends of microstrip and printed antenna technologies, with particular emphasis to recent advances from the last decade Attention is given to fundamental concepts and techniques, their practical applications and the future scope of developments. Several topics, essayed as individual chapters include reconfigurable antenna, ultra-wideband (UWB) antenna, reflectarrays, antennas for RFID systems and also those for body area networks. Also included are antennas using metamaterials and defected ground structures (DGSs). Essential aspects including advanced design, analysis and optimization techniques based on the recent developments have also been addressed. Key Features: Addresses emerging hot topics of research and applications in microstrip and printed antennas Considers the fundamental concepts, techniques, applications and future scope of such technologies Discusses modern applications such as wireless base station to mobile handset, satellite earth station to airborne communication systems, radio frequency identification (RFID) to body area networks, etc. Contributions from highly regarded experts and pioneers from the US, Europe and Asia This book provides a reference for R&D researchers, professors, practicing engineers, and scientists working in these fields. Graduate students studying/working on related subjects will find this book as a comprehensive literature for understanding the present and future trends in microstrip and printed antennas.
Download or read book Waveguide Handbook written by Nathan Marcuvitz and published by IET. This book was released on 1951 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the equivalent-circuit parameters for a large number of microwave structures.
Download or read book Analysis of a Leaky Traveling Wave Antenna Preprint written by and published by . This book was released on 2006 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several leaky traveling wave antennas using the first microstrip higher order mode were simulated with the Finite Difference Time Domain (FDTD) method. The leaky wave antennas investigated here differ from previous designs. The propagation constant of each antenna was extracted from the resulting guided field distribution for comparison with a transverse resonance approximation, measured far-field patterns, and other simulated antennas. Variations of geometry were explored to investigate the complex propagation constant and its effect on the far-field pattern and the bandwidth.
Download or read book Modern Antenna Handbook written by Constantine A. Balanis and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 1617 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most up-to-date, comprehensive treatment of classical and modern antennas and their related technologies Modern Antenna Handbook represents the most current and complete thinking in the field of antennas. The handbook is edited by one of the most recognizable, prominent, and prolific authors, educators, and researchers on antennas and electromagnetics. Each chapter is authored by one or more leading international experts and includes cover-age of current and future antenna-related technology. The information is of a practical nature and is intended to be useful for researchers as well as practicing engineers. From the fundamental parameters of antennas to antennas for mobile wireless communications and medical applications, Modern Antenna Handbook covers everything professional engineers, consultants, researchers, and students need to know about the recent developments and the future direction of this fast-paced field. In addition to antenna topics, the handbook also covers modern technologies such as metamaterials, microelectromechanical systems (MEMS), frequency selective surfaces (FSS), and radar cross sections (RCS) and their applications to antennas, while five chapters are devoted to advanced numerical/computational methods targeted primarily for the analysis and design of antennas.
Download or read book Fundamentals of Terahertz Devices and Applications written by Dimitris Pavlidis and published by John Wiley & Sons. This book was released on 2021-08-02 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: An authoritative and comprehensive guide to the devices and applications of Terahertz technology Terahertz (THz) technology relates to applications that span in frequency from a few hundred GHz to more than 1000 GHz. Fundamentals of Terahertz Devices and Applications offers a comprehensive review of the devices and applications of Terahertz technology. With contributions from a range of experts on the topic, this book contains in a single volume an inclusive review of THz devices for signal generation, detection and treatment. Fundamentals of Terahertz Devices and Applications offers an exploration and addresses key categories and aspects of Terahertz Technology such as: sources, detectors, transmission, electronic considerations and applications, optical (photonic) considerations and applications. Worked examplesbased on the contributors extensive experience highlight the chapter material presented. The text is designed for use by novices and professionals who want a better understanding of device operation and use, and is suitable for instructional purposes This important book: Offers the most relevant up-to-date research information and insight into the future developments in the technology Addresses a wide-range of categories and aspects of Terahertz technology Includes material to support courses on Terahertz Technology and more Contains illustrative worked examples Written for researchers, students, and professional engineers, Fundamentals of Terahertz Devices and Applications offers an in-depth exploration of the topic that is designed for both novices and professionals and can be adopted for instructional purposes.
Download or read book Modern Antenna Design written by Thomas A. Milligan and published by John Wiley & Sons. This book was released on 2005-07-08 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical book written for engineers who design and use antennas The author has many years of hands on experience designing antennas that were used in such applications as the Venus and Mars missions of NASA The book covers all important topics of modern antenna design for communications Numerical methods will be included but only as much as are needed for practical applications
Download or read book Applications of Metamaterials written by Filippo Capolino and published by CRC Press. This book was released on 2017-12-19 with total page 1199 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book uses the first volume’s exploration of theory, basic properties, and modeling topics to develop readers’ understanding of applications and devices that are based on artificial materials. It explores a wide range of applications in fields including electronics, telecommunications, sensing, medical instrumentation, and data storage. The text also includes a practical user’s guide and explores key areas in which artificial materials have developed. It includes experts’ perspectives on current and future applications of metamaterials, to present a well-rounded view on state-of-the-art technologies.
Download or read book Antenna Handbook written by Y.T. Lo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technology has advanced to such a degree over the last decade that it has been almost impossible to find up-to-date coverage of antennas. Antenna Handbook, edited by two of the world's most distinguished antenna speciallists, presents the most advanced antenna theory and designs and demonstrates their application in a wide variety of technical fields. They offer a staggering amount of in-depth data and analysis on a wide range of topics, supported by formulas, curves, and results, as well as derivations.
Download or read book Compact Leaky Wave Antenna Using Ferroelectric Materials written by Hyung Min Jeon and published by . This book was released on 2012 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leaky wave antenna continuously attracts a lot interests for tuning the radiation direction over a large angle. Various types of leaky wave antenna have been developed since 1940. However, most of these leaky wave antennas suffered from their excessive volume and the required wide range of operating frequency (bandwidth) to achieve a large tuning angle. To circumvent these challenges, research in this thesis is focused on implementation of material (like PZT) with high dielectric constant (k) in a rectangular waveguide leaky wave antenna. Due to the high dielectric constant of PZT ~ 1,900, the propagation wavelength in the waveguide can be dramatically shortened. This allows the leaky wave antenna to be operated at much lower frequency, or to have a significant volume reduction. In addition, using high k material enables bandwidth narrowing. In experiments, 70 degree tuning angle was observed by changing frequency from 2.1217 GHz to 2.235 GHz in a proto-type leaky wave antenna filled with material of . The tuning angle can be further adjusted by the slot length and distance.
