Download or read book Antenna Engineering Using Physical Optics written by Leo Diaz and published by Artech House Antenna Library. This book was released on 1996 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spend less time setting up complex antenna design problems and improve the accuracy of your results with this practical new book and software package. It shows you how to combine physical optics modeling techniques with the free space dyadic Green's function to quickly and easily calculate antenna patterns and diffraction from nearby objects, letting your PC do the specialized math for you.
Download or read book Optical Antennas written by Mario Agio and published by Cambridge University Press. This book was released on 2013-01-03 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This consistent and systematic review of recent advances in optical antenna theory and practice brings together leading experts in the fields of electrical engineering, nano-optics and nano-photonics, physical chemistry and nanofabrication. Fundamental concepts and functionalities relevant to optical antennas are explained, together with key principles for optical antenna modelling, design and characterisation. Recognising the tremendous potential of this technology, practical applications are also outlined. Presenting a clear translation of the concepts of radio antenna design, near-field optics and field-enhanced spectroscopy into optical antennas, this interdisciplinary book is an indispensable resource for researchers and graduate students in engineering, optics and photonics, physics and chemistry.
Download or read book Modern Antenna Design written by Thomas A. Milligan and published by John Wiley & Sons. This book was released on 2005-07-11 with total page 646 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 Physical Optics Analysis of Reflector Antennas written by Vania Giacomelli and published by . This book was released on 2001 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of a Generalized Dual Reflector Antenna System Using Physical Optics written by Roberto J. Acosta and published by . This book was released on 1992 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Efficient Physical Optics Method for Circular Reflector Antennas written by Jo-Yu Wu and published by . This book was released on 1991 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of a Generalized Dual Reflector Antenna System Using Physical Optics written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-30 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflector antennas are widely used in communication satellite systems because they provide high gain at low cost. Offset-fed single paraboloids and dual reflector offset Cassegrain and Gregorian antennas with multiple focal region feeds provide a simple, blockage-free means of forming multiple, shaped, and isolated beams with low sidelobes. Such antennas are applicable to communications satellite frequency reuse systems and earth stations requiring access to several satellites. While the single offset paraboloid has been the most extensively used configuration for the satellite multiple-beam antenna, the trend toward large apertures requiring minimum scanned beam degradation over the field of view 18 degrees for full earth coverage from geostationary orbit may lead to impractically long focal length and large feed arrays. Dual reflector antennas offer packaging advantages and more degrees of design freedom to improve beam scanning and cross-polarization properties. The Cassegrain and Gregorian antennas are the most commonly used dual reflector antennas. A computer program for calculating the secondary pattern and directivity of a generalized dual reflector antenna system was developed and implemented at LeRC. The theoretical foundation for this program is based on the use of physical optics methodology for describing the induced currents on the sub-reflector and main reflector. The resulting induced currents on the main reflector are integrated to obtain the antenna far-zone electric fields. The computer program is verified with other physical optics programs and with measured antenna patterns. The comparison shows good agreement in far-field sidelobe reproduction and directivity. Acosta, Roberto J. and Lagin, Alan R. Glenn Research Center RTOP 679-40-00...
Download or read book Engineering Optics written by Keigo Iizuka and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Which area do you think I should go into?" or "Which are the areas that have the brightest future?" are questions that are frequently asked by students trying to decide on a field of specialization. My advice has always been to pick any field that combines two or more disciplines such as Nuclear Physics, Biomedical Engineering, Optoelectronics, or even Engineering Optics. With the ever growing complexity of today's science and technology, many a problem can be tackled only with the cooperative effort of more than one discipline. Engineering Optics deals with the engineering aspects of optics, and its main emphasis is on applying the knowledge. of optics to the solution of engineering problems. This book is intended both for the physics student who wants to apply his knowledge of optics to engineering problems and for the engineering student who wants to acquire the basic principles of optics. The material in the book was arranged in an order that would progres sively increase the student's comprehension of the subject. Basic tools and concepts presented in the earlier chapters are then developed more fully and applied in the later chapters. In many instances, the arrangement of the material differs from the true chronological order. The following is intended to provide an overview of the organization of the book. In this book, the theory of the Fourier transforms was used whenever possible because it provides a simple and clear explanation for many phenomena in optics. Complicated mathematics have been com pletely eliminated.
Download or read book Surface Electromagnetics written by Fan Yang and published by Cambridge University Press. This book was released on 2019-06-20 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by the leading experts in the field, this text provides systematic coverage of the theory, physics, functional designs, and engineering applications of advanced engineered electromagnetic surfaces. All the essential topics are included, from the fundamental theorems of surface electromagnetics, to analytical models, general sheet transmission conditions (GSTC), metasurface synthesis, and quasi-periodic analysis. A plethora of examples throughout illustrate the practical applications of surface electromagnetics, including gap waveguides, modulated metasurface antennas, transmit arrays, microwave imaging, cloaking, and orbital angular momentum (OAM ) beam generation, allowing readers to develop their own surface electromagnetics-based devices and systems. Enabling a fully comprehensive understanding of surface electromagnetics, this is an invaluable text for researchers, practising engineers and students working in electromagnetics antennas, metasurfaces and optics.
Download or read book Physical Optics Analysis of Electrically Small Slot fed Substrate Lens Antennas written by Joey R. Bray and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the current explosion of microwave wireless communication systems comes the need to produce low cost miniaturized components. Integrated antennas, such as planar microstrip-fed patches and slots, are a promising means of combining the antenna function with the associated transceiver circuitry. However, these antennas suffer from a bi-directional radiation pattern, power loss via substrate modes, a broad radiation pattern, or a combination of the above. To correct these problems, a dielectric lens of hemispherical shape, or slight variation thereof, can be placed directly upon the planar antenna, forming what is called a Substrate Lens Antenna (SLA). At sub-millimeter-wave frequencies, a SLA becomes unattractive because its diameter is typically larger than a free-space wavelength. Such lenses become heavy, bulky and expensive as the operating frequency is reduced. This thesis investigates electrically small, slot antenna fed, SLAs operating at 10 GHz in an attempt to facilitate the integration of these devices. (Abstract shortened by UMI.).
Download or read book Analysis of Reflector Antennas written by W. V. T. Rusch and published by Academic Press. This book was released on 2013-10-22 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of Reflector Antennas provides information pertinent to the analysis of reflector-antenna systems. This book provides an understanding of how design data have been and can be derived. Organized into four chapters, this book begins with an overview of the history of focusing reflector-antenna systems characterized by a highly variable level of general interest. This text then examines the solutions of the scalar Helmholtz equation in rectangular and spherical coordinates. Other chapters consider antenna performance described in terms of several fundamental properties, including capture area, directivity, gain, beam efficiency, aperture efficiency, polarization, effective noise temperature, and phase center. This book discusses as well the resulting functional dependence between axial ratio and component amplitude, which is the same as that between voltage standing wave ratio and voltage reflection coefficient. The final chapter deals with the role of the special-purpose digital computers. This book is a valuable resource for research and development engineers.
Download or read book Analysis of Radome enclosed Antennas written by D. J. Kozakoff and published by Artech House. This book was released on 2010 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: A radome is a structural, weatherproof enclosure that protects microwave and radar antenna from ice, freezing rain, wind, and debris. This new, updated edition to an Artech House classic provides a current, comprehensive overview of the design and analysis of radomes. The second edition includes a wealth of new material, including three new chapters on radome measurement techniques, environmental effects on radomes, and new radome technology. This unique book helps professionals to design radomes for top performance, understand the effect a radome has on a particular antenna's operation, and become knowledgeable about how to specify acceptable radome equipment. Over 130 illustrations and more than 250 equations support key topics throughout the book. CD-ROM Included! Includes powerful codes and highly useful tools that help professionals estimate the electrical performance degradation that may occur when an antenna system is enclosed by a radome.
Download or read book Foundations of Antenna Engineering A Unified Approach for Line of Sight and Multipath written by Per-Simon Kildal and published by Artech House. This book was released on 2015-06-01 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first textbook that contains a holistic treatment of antennas both for traditional antennas mounted on masts (Line-of-Sight antenna systems) and for small antennas used on modern wireless devices such as smart phones being subject to signal variations (fading) due to multipath propagation. The focus is on characterization, as well as describing classical antennas by modern complex vector theory - thereby linking together many disciplines such as electromagnetic theory, classical antenna theory, wave propagation, and antenna system performance. Overall, this book represents a rethinking of the way basic antenna theory is presented. The book contains many references to important old and new papers and books on the analysis and design of the most useful antenna types, for the most interested readers.
Download or read book The Short Backfire Antenna A Numerical Physical Optics Study of Its Characteristics written by Tsing-Zone Hsieh and published by . This book was released on 1971 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical-physical optics method is applied to study the circuit (impedance) and radiation characteristics of the short-backfire antenna. This radiator, developed through extensive experimentation by AFCRL, consists of a dipole exciter located between a large rimmed reflector and a small secondary reflector. It has wide bandwidth and high directivity comparable to sophisticated reflector antennas. In the numerical-physical optics method, the following steps are followed: (1) a set of coupled integral equations for the currents excited in the dipole and on the surface of the secondary reflector are formulated and solved numerically, assuming for this step that the large reflector is infinite; (2) the surface currents of the large reflector are approximated by a truncated form of those calculated for the infinite conducting sheet; (3) the radiation field maintained by the currents of the steps (1) and (2) is calculated; and (4) a diffracted field correction is made to account for the finite dimensions of the large reflector and its rim. This method has the advantage, relative to earlier studies, that it can successfully predict the antenna's circuit characteristics. Excellent results are obtained for both square and circular geometries. Comparison is made with experimental measurements made by AFCRL. (Author).
Download or read book Antenna Theory and Design written by Warren L. Stutzman and published by Wiley-Interscience. This book was released on 1998 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highly respected authors have reunited to update the well known 1981 edition which is still hailed as one of the best in its field. This edition includes recent antenna innovations and applications. It features a succinct treatment of the finite difference, time domain (FDTD) computational technique. It is also the first text to treat physical theory of diffraction (PTD).
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.
Download or read book Analyzing the Physics of Radio Telescopes and Radio Astronomy written by Yeap, Kim Ho and published by IGI Global. This book was released on 2020-02-07 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the field of astrophysics, modern developments of practice are emerging in order to further understand the spectral information derived from cosmic sources. Radio telescopes are a current mode of practice used to observe these occurrences. Despite the various accommodations that this technology offers, physicists around the globe need a better understanding of the underlying physics and operational components of radio telescopes as well as an explanation of the cosmic objects that are being detected. Analyzing the Physics of Radio Telescopes and Radio Astronomy is an essential reference source that discusses the principles of the astronomical instruments involved in the construction of radio telescopes and the analysis of cosmic sources and celestial objects detected by this machinery. Featuring research on topics such as electromagnetic theory, antenna design, and geometrical optics, this book is ideally designed for astrophysicists, engineers, researchers, astronomers, students, and educators seeking coverage on the operational methods of radio telescopes and understanding the physical processes of radio astronomy.
