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Double Spherical Cassegrain Reflector With A Single Displaced Feed
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Book Synopsis Double-Spherical Cassegrain Reflector with a Single Displaced Feed by : Akira Ishimaru
Download or read book Double-Spherical Cassegrain Reflector with a Single Displaced Feed written by Akira Ishimaru and published by . This book was released on 1973 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: For multibeam operation of an antenna, it is necessary for some of the feeds to be displaced from the axis of symmetry. The effects of such displacement are investigated for the double-spherical Cassegrain reflector. Aperture blocking, phase error, radiation pattern, aperture efficiency, beam-width and sidelobe level are studied as functions of the displacement angle xi. An attempt to improve the performance of the antenna by tilting the feed through an angle zeta is made, and a practical feed pattern is used to evaluate the system. The results indicate that very narrow beamwidth and reasonably low sidelobes can be obtained, which are essential for multibeam antennas. The decrease of the aperture efficiency due to a displacement and a tilt of the feed is studied in detail for different reflector sizes and feed pattern. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1984 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 1973 International Conference on Communications by :
Download or read book 1973 International Conference on Communications written by and published by . This book was released on 1973 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Antenna Theory and Design by : Warren L. Stutzman
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.
Book Synopsis Handbook of Reflector Antennas and Feed Systems Volume I: Theory and Design of Reflectors by : Satish K. Sharma
Download or read book Handbook of Reflector Antennas and Feed Systems Volume I: Theory and Design of Reflectors written by Satish K. Sharma and published by Artech House. This book was released on 2013-07-01 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first truly comprehensive and most up-to-date handbook available on modern reflector antennas and feed sources for diversified space and ground applications. There has never been such an all-encompassing reflector handbook in print, and no currently available title offers coverage of such recent research developments. The Handbook consists of three volumes. Volume I provides a unique combination of theoretical underpinnings with design considerations and techniques. The need for knowledge in reflector antennas has grown steadily over the last two decades due to increased use in space and ground applications, as well as their high gain and wide bandwidth capabilities at relatively low cost. This volume brings you to the leading edge of developments in the field related to numerical techniques, classical reflector geometries, adaptive reflector antennas, shaped reflectors, bifocal and bicollimated dual reflectors, advanced reflectors, and reflect arrays. A must-have reference for both practicing engineers as well as academic researchers.
Book Synopsis Antenna Theory by : Constantine A. Balanis
Download or read book Antenna Theory written by Constantine A. Balanis and published by John Wiley & Sons. This book was released on 2005-04-04 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discipline of antenna theory has experienced vast technological changes. In response, Constantine Balanis has updated his classic text, Antenna Theory, offering the most recent look at all the necessary topics. New material includes smart antennas and fractal antennas, along with the latest applications in wireless communications. Multimedia material on an accompanying CD presents PowerPoint viewgraphs of lecture notes, interactive review questions, Java animations and applets, and MATLAB features. Like the previous editions, Antenna Theory, Third Edition meets the needs of electrical engineering and physics students at the senior undergraduate and beginning graduate levels, and those of practicing engineers as well. It is a benchmark text for mastering the latest theory in the subject, and for better understanding the technological applications. An Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department.
Book Synopsis Foundations of Antenna Engineering: A Unified Approach for Line-of-Sight and Multipath by : Per-Simon Kildal
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 Government Reports Index written by and published by . This book was released on 1973 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modern Antenna Design by : Thomas A. Milligan
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 Antenna Handbook written by Y.T. Lo and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 2282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques based on the method of modal expansions, the Rayleigh-Stevenson expansion in inverse powers of the wavelength, and also the method of moments solution of integral equations are essentially restricted to the analysis of electromagnetic radiating structures which are small in terms of the wavelength. It therefore becomes necessary to employ approximations based on "high-frequency techniques" for performing an efficient analysis of electromagnetic radiating systems that are large in terms of the wavelength. One of the most versatile and useful high-frequency techniques is the geometrical theory of diffraction (GTD), which was developed around 1951 by J. B. Keller [1,2,3]. A class of diffracted rays are introduced systematically in the GTD via a generalization of the concepts of classical geometrical optics (GO). According to the GTD these diffracted rays exist in addition to the usual incident, reflected, and transmitted rays of GO. The diffracted rays in the GTD originate from certain "localized" regions on the surface of a radiating structure, such as at discontinuities in the geometrical and electrical properties of a surface, and at points of grazing incidence on a smooth convex surface as illustrated in Fig. 1. In particular, the diffracted rays can enter into the GO shadow as well as the lit regions. Consequently, the diffracted rays entirely account for the fields in the shadow region where the GO rays cannot exist.
Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1973-10-10 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Handbook of Antenna Design by : Alan W. Rudge
Download or read book The Handbook of Antenna Design written by Alan W. Rudge and published by IET. This book was released on 1982 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the fundamental background theory and analytical techniques of antenna design. It deals with a very wide range of antenna types, operating from very low frequencies to millimetre waves.
Book Synopsis Journal of Electrical and Electronics Engineering, Australia by :
Download or read book Journal of Electrical and Electronics Engineering, Australia written by and published by . This book was released on 1988 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radio Science written by and published by . This book was released on 1976 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 1986 International Symposium Digest by :
Download or read book 1986 International Symposium Digest written by and published by . This book was released on 1986 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Links for the Future by : P. Dewilde
Download or read book Links for the Future written by P. Dewilde and published by North Holland. This book was released on 1984 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Symposium Digest, Antennas and Propagation by :
Download or read book International Symposium Digest, Antennas and Propagation written by and published by . This book was released on 1988 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
