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Antenna Measurements Using Near Field Scanning Techniques
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Book Synopsis Spherical Near-field Antenna Measurements by : Jesper E. Hansen
Download or read book Spherical Near-field Antenna Measurements written by Jesper E. Hansen and published by IET. This book was released on 1988 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the aspects of antenna test ranges, data processing schemes and measurement schemes.
Book Synopsis Principles of Planar Near-Field Antenna Measurements by : Stuart Gregson
Download or read book Principles of Planar Near-Field Antenna Measurements written by Stuart Gregson and published by IET. This book was released on 2007-12-31 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: This single volume provides a comprehensive introduction and explanation of both the theory and practice of 'Planar Near-Field Antenna Measurement' from its basic postulates and assumptions, to the intricacies of its deployment in complex and demanding measurement scenarios. To do this the book initially examines the properties of antennas that allow them to enhance the free space interaction of electronic systems and this leads into a full description of the theory of 'Planar Near-Field Scanning'.
Book Synopsis Near-Field Antenna Measurements by : Vadim Serafimovich Kalashnikov
Download or read book Near-Field Antenna Measurements written by Vadim Serafimovich Kalashnikov and published by Springer Nature. This book was released on 2021-04-27 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is useful both for those who want to get initial information on the measurement of the antenna parameters, and for specialists directly involved in the experimental determination of the antenna parameters from the results of measuring the amplitude-phase distribution in the near zone of the antennas. Currently, the near-field method is the most common one for antenna measurements. In most books, an academic approach is given to the issue under consideration and it is difficult to use them for the direct organization of measurements. In many others, specific narrow issues are considered that are accessible to understanding only by highly qualified engineers/readers. The purpose of this book is to get rid of the above disadvantages by offering the reader a more accessible exposition and formulas by which appropriate computer programs can be written with minimal effort. The contents of this book allow interested specialists to be not only users of the near-field measuring facilities, but also help in understanding the principles of their work. This book is intended for engineers and specialists whose activities are related to experimental testing of radio characteristics of complex antenna systems, especially near-field measurements, and is also useful as a textbook for senior students in the field of “radioelectronics” and “radiophysics.”
Book Synopsis Antenna Measurements Using Near-field Scanning Techniques by : J. Appel- Hansen
Download or read book Antenna Measurements Using Near-field Scanning Techniques written by J. Appel- Hansen and published by . This book was released on 1980 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Near-field antenna measurements on a cylindrical surface by : Arthur D. Yaghjian
Download or read book Near-field antenna measurements on a cylindrical surface written by Arthur D. Yaghjian and published by . This book was released on 1977 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electromagnetics Institute, Technical University Denmark by : J. Appel-Hansen
Download or read book Electromagnetics Institute, Technical University Denmark written by J. Appel-Hansen and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electromagnetics Institute, Technical University Denmark by :
Download or read book Electromagnetics Institute, Technical University Denmark written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Probe Correction for Near-Field Antenna Measurements by : A. D. Yaghjian
Download or read book Probe Correction for Near-Field Antenna Measurements written by A. D. Yaghjian and published by . This book was released on 1985 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: To quote Kummer and Gillespie (Proc. IEEE, April, 1978), 'The antenna measurements' problem is now of equal difficulty with that of design; now the antenna engineer often has to design the antenna as well as the method of measurement.' In addition they state that 'The near-field technique may well become accepted as the most accurate technique for the measurement of power gain and of patterns for antennas that can be accommodated by the measuring apparatus.' However, in order to accurately determine the far fields of antennas from near-field measurements, one has to correct, in general, for the nonideal response of the measurement probe. In this paper we review planar, cylindrical, and spherical scanning; and show how probe correction can be introduced as a simple modification to near-field scanning with ideal dipole probes that measure the electric or magnetic field at a point. Data sampling spacing, efficient computational methods, and experimental errors involved with near-field measurements are also discussed. (Author).
Book Synopsis The Plane Wave Spectrum Representation of Electromagnetic Fields by : P. C. Clemmow
Download or read book The Plane Wave Spectrum Representation of Electromagnetic Fields written by P. C. Clemmow and published by Oxford University Press, USA. This book was released on 1996 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical Engineering/Electromagnetics The Plane Wave Spectrum Representation of Electromagnetic Fields A classic reissue in the IEEE/OUP Series on Electromagnetic Wave Theory Donald G. Dudley, Series Editor"I am pleased to see that the IEEE Press and OUP have secured the rights to republish this excellent monograph ... a long-cherished exposition on the angular spectrum concept."--James R. WaitThe purpose of this book is to explain how general electromagnetic fields can be represented by the superposition of plane waves traveling in diverse directions, and to illustrate the way in which this plane wave spectrum representation can be put to good use in treating various characteristic problems belonging to the classical theories of radiation, diffraction and propagation. The book offers a largely unified theory of a range of problems, solutions to all of which are obtained in forms at least patently capable of yielding numerical results by straightforward means. The reader is assumed to be competent at integration in the complex plane, but otherwise the discussion is virtually self-contained. The aim is to furnish the student of electromagnetic theory with a useful technical tool and a comparatively compact account of some interesting aspects of his discipline. The contents are presented in two parts. The first, under the heading of Theory, covers Preliminaries, Plane wave representations; and Supplementary theory. The second, with the heading Application, deals with Diffraction by a plane screen; Propagation over a uniform plane surface; Propagation over a two-part plane surface; The field of a moving point charge; and Sources of anisotropic media. Also in the series ... Field Computation by Moment Method An IEEE/OUP classic reissue R.F. Harrington, Syracuse University 1995, Hardcover, 240 pp. Waves and Fields in Inhomogeneous Media An IEEE/OUP classic reissue Weng Cho Chew, University of Illinois at Urbana-Champaign 1995, Hardcover, 632 pp. Methods in Electromagnetic Wave Propagation Second Edition D.S. Jones, University of Dundee 1994, Hardcover, 686 pp. About the seriesFormerly the IEEE Press Series on Electromagnetic Waves, this new joint series between IEEE Press and Oxford University Press offers even better coverage of the field with new titles as well as reprintings and revisions of recognized classics that maintain long-term archival significance in electromagnetic waves and applications. Designed specifically for graduate students, practicing engineers, and researchers, this series provides affordable volumes that explore electromagnetic waves and applications beyond the undergraduate level
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 Near-Field Antenna Measurements by : Vadim Serafimovich Kalashnikov
Download or read book Near-Field Antenna Measurements written by Vadim Serafimovich Kalashnikov and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is useful both for those who want to get initial information on the measurement of the antenna parameters, and for specialists directly involved in the experimental determination of the antenna parameters from the results of measuring the amplitude-phase distribution in the near zone of the antennas. Currently, the near-field method is the most common one for antenna measurements. In most books, an academic approach is given to the issue under consideration and it is difficult to use them for the direct organization of measurements. In many others, specific narrow issues are considered that are accessible to understanding only by highly qualified engineers/readers. The purpose of this book is to get rid of the above disadvantages by offering the reader a more accessible exposition and formulas by which appropriate computer programs can be written with minimal effort. The contents of this book allow interested specialists to be not only users of the near-field measuring facilities, but also help in understanding the principles of their work. This book is intended for engineers and specialists whose activities are related to experimental testing of radio characteristics of complex antenna systems, especially near-field measurements, and is also useful as a textbook for senior students in the field of "radioelectronics" and "radiophysics.".
Book Synopsis Near-Field Antenna Measurements on a Cylindrical Surface by : Arthur D. Yaghjian
Download or read book Near-Field Antenna Measurements on a Cylindrical Surface written by Arthur D. Yaghjian and published by Forgotten Books. This book was released on 2017-10-28 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Near-Field Antenna Measurements on a Cylindrical Surface: A Source Scattering-Matrix Formulation This work addresses the problem of measuring the radiating fields of a test antenna by scanning with a probe antenna on an imaginary cylinder surrounding the test antenna. The problem of measuring the receiving characteristics of the test antenna is very closely related, but for the sake of brevity it will be left as an exercise for the reader. Of course, most antennas are reciprocal so once the radiating or transmitting characteristics are determined the receiving properties follow immediately from the reciprocity relationship (15a). As a first step in formulating the cylindrical scanning technique, the EM fields outside an arbitrary test antenna radiating into free space will be expanded in a complete set of cylindrical waves (eigenfunctions or modes). The test antenna and its coordinate system fixed to the test antenna are shown schematically in figure 1. In cylindrical coordinates the point P is designated by (p, in spherical coordinates by (r, o, It has been shown [4] that in cylindrical coordinates the (e, H) fields in free space (in this case outside the radius (a) of the smallest cylinder circumscribing the test antenna) About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis An Investigation of Adaptive Acquisition Techniques for Planar Near-field Antenna Measurements by : Garrett Parsons
Download or read book An Investigation of Adaptive Acquisition Techniques for Planar Near-field Antenna Measurements written by Garrett Parsons and published by . This book was released on 2009 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adaptive Acquisition Techniques for Spherical Near-Field Antenna Measurements by : Vincent Beaulé
Download or read book Adaptive Acquisition Techniques for Spherical Near-Field Antenna Measurements written by Vincent Beaulé and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a practical approach to reduce the overall testing time in a spherical near-field (SNF) antenna measurement environment. The premise of this work is that the acquisition time is mostly dominated by the mechanical movement and the processing electronic. Moreover, it is assumed that the transformation time to go from the near-field domain to the far-field domain (NF-FF transform) is small compared to the acquisition time. Thus this operation can be done repeatedly while the acquisition is on-going without significantly affecting the overall test time. This situation allows to continuously evaluate the far-field (FF) of the antenna under test (AUT), so that certain decision functions based on the radiation pattern of the antenna can be monitored. Such decision functions are based on the antenna specification, such as the gain, the side lobe level, etc. We do not proceed with a complete scan of the measurement sphere but effectively allow the probe to follow a directed path under control of an acquisition rule, so that the sampled near-field (NF) datapoints constitute an acquisition map on the sphere. The acquisition can then be terminated based on decision function values, allowing the smallest amount of data needed to ensure accurate determination of the AUT performance measures.
Book Synopsis Analysis and Design of Antennas and Algorithms for Near-Field Sensing by : Davide Comite
Download or read book Analysis and Design of Antennas and Algorithms for Near-Field Sensing written by Davide Comite and published by Sapienza Università Editrice. This book was released on 2020-06-30 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume collects the main results of the Author’s Ph.D. course in Electromagnetics and Mathematical Models for Engineering, attended at ‘Sapienza’ University of Rome from November 2011 to February 2015, in the Electromagnetic Fields 1 Lab of the Department of Information Engineering, Electronics and Telecommunications, under the tutoring of Prof. Alessandro Galli.
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.
Book Synopsis Theory and Practice of Modern Antenna Range Measurements by : Clive Parini
Download or read book Theory and Practice of Modern Antenna Range Measurements written by Clive Parini and published by IET. This book was released on 2014-10-14 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive introduction and explanation of both the theory and practice of all forms of modern antenna measurements, electromagnetic theory, antenna coupling, compact range measurements, near-field antenna measurements, mobile and body-centric antenna measurements.
