Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Parasitic Feed Elements For Reflector Antennas
Download Parasitic Feed Elements For Reflector Antennas full books in PDF, epub, and Kindle. Read online Parasitic Feed Elements For Reflector Antennas ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Parasitic Feed Elements for Reflector Antennas by : Gregory J. Durnan
Download or read book Parasitic Feed Elements for Reflector Antennas written by Gregory J. Durnan and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The use of parasitic wire dipoles are examined when placed in the proximity of a focused dipole feed in a parabolic reflector antenna. These parasitic elements are rotated around the feed dipole and a search is performed for the ideal positioning so as to yield maximum radiated power and main beam shift in order to develop a novel form of angle diversity. In addition a comparison is made between 2 element dipole feed structures and linearly and circularly polarised patch feed structures. In order to analytically model the structure, mutual coupling between feed elements is calculated taking into account a varying reflection coełcient due to an impedance mismatch between the transmission line and driven element. An analytical treatment of the calculation of the radiated co-polar and cross-polar feed pattern is presented in addition to the projected field at the reflector surface. A comparison is made to the results presented by E.M.T Jones in the 1954 IRE Transactions of Antennas and Propagation paper entitled 'Paraboloid Reflector and Hyperboloid Lens Antennas'. A theoretical treatment of the reflected field and far field radiation pattern is then presented using the methods of Geometrical Optics, Physical Optics and Fourier analysis. The author derives analytical equations for multiple element incident feed fields and surface current equations for half wave feeds of arbitrary position and number. The fndings are confirmed using a comparison of three methods. These are; original code developed from analytical derivations, the NEC2 Method of Moments using a meshed reflector model and finally, by experimental methods. Analysis of a 30cm 0.4 F/D prime focus reflector at 3GHz using a 2 element feed yields up to 2dB gain over a single dipole feed when the element is displaced either laterally or at 60 or 120 degrees from the feed axis. The optimum offset from the driven element is in the 0.4 to 0.6ı range. Maximum beam shift for this structure at the half power points is shown to be approximately 10 degrees. When designed as a low-cost system with undemanding polarisation requirements the structure presented provides an easily implemented or retrofitted alternative to multiple antenna diversity solutions.
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
Book Synopsis ANTENNAS AND WAVE PROPAGATION by : YADAVA, R. L.
Download or read book ANTENNAS AND WAVE PROPAGATION written by YADAVA, R. L. and published by PHI Learning Pvt. Ltd.. This book was released on 2022-03-24 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, now in its Second Edition, is primarily intended for the undergraduate and postgraduate students of electronics and communication, electronics and electrical and telecommunication engineering. It provides a thorough understanding of the fundamentals and applications of the subject. The edition discusses the properties of several types of antennas such as dipoles, loop, Yagi-Uda, log-periodic, slot/DRA and microstrip antennas and also explains the phenomenon of wave propagation with emphasis on theory of operation and design procedures. It provides a comprehension of the principles of radiation and methods of excitation. The book also focuses on antenna measurements along with necessary requirements and different methods of measurement. Written in an easy-to-understand manner, the text includes several illustrative examples. A large number of solved examples and exercise problems with varying difficulty levels are included to reinforce the theoretical understanding of concepts. The book also contains several objective-type questions in each chapter along with a Question Bank at the end of the book. The Appendices provide a rich source of information and expressions as well as design data. NEW TO THE SECOND EDITION Separate new chapters are devoted to: • Reflector Antennas • Slot and Dielectric Resonator Antennas • Modern Antennas • Effect of Ground on Antenna Performances
Book Synopsis Preliminary Design of 19-element Feed Cluster for a Large F/D Reflector Antenna by :
Download or read book Preliminary Design of 19-element Feed Cluster for a Large F/D Reflector Antenna written by and published by . This book was released on 1983 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modern Antenna Handbook by : Constantine A. Balanis
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.
Book Synopsis Handbook of Engineering Electromagnetics by : Rajeev Bansal
Download or read book Handbook of Engineering Electromagnetics written by Rajeev Bansal and published by CRC Press. This book was released on 2004-09-01 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineers do not have the time to wade through rigorously theoretical books when trying to solve a problem. Beginners lack the expertise required to understand highly specialized treatments of individual topics. This is especially problematic for a field as broad as electromagnetics, which propagates into many diverse engineering fields. The time h
Book Synopsis AF Manual by : United States. Department of the Air Force
Download or read book AF Manual written by United States. Department of the Air Force and published by . This book was released on 1953 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis FUNDAMENTALS OF ELECTROMAGNETIC THEORY, Second Edition by : DASH, SAROJ K.
Download or read book FUNDAMENTALS OF ELECTROMAGNETIC THEORY, Second Edition written by DASH, SAROJ K. and published by PHI Learning Pvt. Ltd.. This book was released on 2011-01-01 with total page 921 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second Edition of this book, while retaining the contents and style of the first edition, continues to fulfil the require-ments of the course curriculum in Electromagnetic Theory for the undergraduate students of electrical engineering, electronics and telecommunication engineering, and electro-nics and communication engineering. The text covers the modules of the syllabus corresponding to vectors and fields, Maxwell’s equations in integral form and differential form, wave propagation in free space and material media, transmission line analysis and waveguide principles. It explains physical and mathematical aspects of the highly complicated electromagnetic theory in a very simple and lucid manner. This new edition includes : • Two separate chapters on Transmission Line and Waveguide • A thoroughly revised chapter on Plane Wave Propagation • Several new solved and unsolved numerical problems asked in various universities’ examinations
Book Synopsis Antenna and Wave Propagation by : Ashish Mathur
Download or read book Antenna and Wave Propagation written by Ashish Mathur and published by Scientific Publishers. This book was released on 2011-01-01 with total page 695 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is designed for the final year students in electronics and communication and for the first year post graduate students in Digital Communication and allied subjects. This compact and comprehensive text fulfils the long felt need for a suitable text book in the area of “Antenna and wave Propagation”. It is written as per the revised syllabus of Rajasthan Technical University (RTU), Kota. It covers the topics, of fundamentals of antenna, types of antenna, antenna arrays, radio propagation modes, with basics of IE3D software and advance antenna topics. This well organized text lays emphasis on all the modes of propagation and practical aspects of antenna, with worked out examples & further previous year solved paper are included topic wise, which would be of considerable assistance to the reader. This comprehensive book covering all aspects of antenna and wave propagations, should prove to be an invaluable asset to both students & professionals. Features: According to the syllabus prescribed by Rajasthan Technical University (RTU), Kota. Including previous year's university papers. Precise definitions and clear exposure of fundamental concepts. Simple and easy explanation of the topics along with well labelled diagrams. Step by step procedure is followed for explaining the topics. Detailed coverage of advance antennas, helpful for the post graduation students. The recent applications of antenna are also summarized here again proving fruitful for the M.Tech. Students. IE3D software basic is been included for the purpose of dissertation for M. Tech. Students. Ideally suitable for self study.
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.
Book Synopsis Official Gazette of the United States Patent Office by : United States. Patent Office
Download or read book Official Gazette of the United States Patent Office written by United States. Patent Office and published by . This book was released on 1970 with total page 2814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Official Gazette of the United States Patent and Trademark Office by : United States. Patent and Trademark Office
Download or read book Official Gazette of the United States Patent and Trademark Office written by United States. Patent and Trademark Office and published by . This book was released on 2001 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The A.R.R.L. Antenna Book by : American Radio Relay League
Download or read book The A.R.R.L. Antenna Book written by American Radio Relay League and published by . This book was released on 1949 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Antennas for Communication by : Ruchi Kadwane Assistant Professor, SBITM, Betul (M.P.) Dr. Jaikaran Singh Professor, LNCT Bhopal (M.P.) Nitya
Download or read book Antennas for Communication written by Ruchi Kadwane Assistant Professor, SBITM, Betul (M.P.) Dr. Jaikaran Singh Professor, LNCT Bhopal (M.P.) Nitya and published by Nitya Publications. This book was released on 2022-01-01 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aviation Electronics Technician 1 & C. by : United States. Bureau of Naval Personnel
Download or read book Aviation Electronics Technician 1 & C. written by United States. Bureau of Naval Personnel and published by . This book was released on 1968 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Antennas in Wireless Communications by : Lal Chand Godara
Download or read book Handbook of Antennas in Wireless Communications written by Lal Chand Godara and published by CRC Press. This book was released on 2018-10-03 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt: The move toward worldwide wireless communications continues at a remarkable pace, and the antenna element of the technology is crucial to its success. With contributions from more than 30 international experts, the Handbook of Antennas in Wireless Communications brings together all of the latest research and results to provide engineering professionals and students with a one-stop reference on the theory, technologies, and applications for indoor, hand-held, mobile, and satellite systems. Beginning with an introduction to wireless communications systems, it offers an in-depth treatment of propagation prediction and fading channels. It then explores antenna technology with discussion of antenna design methods and the various antennas in current use or development for base stations, hand held devices, satellite communications, and shaping beams. The discussions then move to smart antennas and phased array technology, including details on array theory and beamforming techniques. Space diversity, direction-of-arrival estimation, source tracking, and blind source separation methods are addressed, as are the implementation of smart antennas and the results of field trials of systems using smart antennas implemented. Finally, the hot media topic of the safety of mobile phones receives due attention, including details of how the human body interacts with the electromagnetic fields of these devices. Its logical development and extensive range of diagrams, figures, and photographs make this handbook easy to follow and provide a clear understanding of design techniques and the performance of finished products. Its unique, comprehensive coverage written by top experts in their fields promises to make the Handbook of Antennas in Wireless Communications the standard reference for the field.
