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Author : Punit S. Verma
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (952 download)
Download or read book Fast and Efficient Algorithm for Near Field Analysis of Conformal Antenna Arrays written by Punit S. Verma and published by . This book was released on 2002 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Muhammad Ayyaz Qureshi
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (881 download)
Download or read book Near-field Error Analysis and Efficient Sampling Techniques for the Fast Irregular Antenna Field Transformation Algorithm written by Muhammad Ayyaz Qureshi and published by . This book was released on 2013 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Matthew B. Stephanson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (122 download)
Download or read book A Fast Near- to Far-field Transform Algorithm written by Matthew B. Stephanson and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: A frequent problem in computational electromagnetics is to calculate the electromagnetic field far from a radiating object. This has numerous applications, such as antenna analysis and determining the radar cross sections of airplanes, ships, etc. Another application to converting near field measurements, taken in an indoor measurement range for instance, and transforming them to the far-zone. However, when the field of a large object needs to be calculated in many directions, however, this computation can take too long to be practical. The goal of this project is to develop an algorithm to greatly speed up this calculation by using a divide-and-conquer approach. First, the necessary background information in electromagnetics and numerical methods is presented. Then, a near to far field transform with potential for O(N^1.5) time complexity is discussed, where N is the number of basis elements used to approximate the object's surface. Finally, the running time and accuracy of the algorithm is discussed, with comparisons to another near to far field computer program for two problem geometries, a VFY-218 airplane with N = 53,054 and an antenna array with N = 106,792. The results show the fast near to far transform can be 30 times faster with an RMS relative error of 2.05e-5, compared to traditional methods.
Author : Wolfgang H. Kummer
Publisher :
ISBN 13 :
Total Pages : 97 pages
Book Rating : 4.:/5 (227 download)
Download or read book Conformal Antenna Arrays Study written by Wolfgang H. Kummer and published by . This book was released on 1973 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two methods of synthesizing patterns from conical arrays were investigated during this period. In the first method the equivalence principle was used to synthesize patterns that are approximate duplicates of the patterns of representative planar arrays. This is done by evaluating on the surface of the cone the near field of a centrally located and mechanically steered hypothetical planar array. These near fields are used to calculate the required complex excitations of real elements on the surface of the cone to nearly duplicate the pattern of the hypothetical planar array. Patterns are presented of the results for two beam pointing directions. In the second method of synthesizing patterns from a conical surface, a heuristic approach was taken wherein the placement of the elements on the surface was based on extrapolations from linear and circular array theory and practice. Several element configurations are considered and numerous computer patterns are presented. The characteristics of these patterns are summarized by comparing in graphical form grating lobe levels, first sidelobe levels, and back-lobe levels for all of the patterns.
Author : Neil Norman Jackson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (117 download)
Download or read book Analysis and Optimisation of Array Antennas for Near-field Plane Wave Synthesis written by Neil Norman Jackson and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiated electromagnetic compatibility (EMC) testing requires field distributions of uniform intensity throughout a test zone. This field condition is achieved within a plane wave. The use of the reflector-fed compact range for generating plane waves is well established for antenna measurements in the microwave frequency region. Extension of this technique into the sub-microwave range poses problems and this work investigates the applicability of antenna arrays for such tests. The basic problem is to determine suitable array element excitations in order to generate an approximate plane wave in the antenna near-field. Some general numerical synthesis techniques are described and shown to be applicable to arrays of arbitrary element composition and geometry. For concept verification, a prototype array of log-periodic dipole antennas was constructed and its performance accurately predicted using a computer model. Factors affecting the plane wave quality are discussed and adequate performance for some types of antenna measurements as well as for EMC testing is illustrated. One important factor influencing the plane wave quality is the geometrical arrangement of the array elements. A novel procedure for optimising the array element locations using a genetic algorithm is presented. Practical array design issues are addressed and the development of a computer-controlled wide-band feed network is presented. As an exercise in application of the array-illuminated compact range, its use to irradiate a sphere simulating the human head is discussed. Measurements of the field distribution were used to validate a finite-difference time-domain computer model of the system.
Author :
Publisher :
ISBN 13 :
Total Pages : 836 pages
Book Rating : 4.:/5 (31 download)
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:
Author : Su-Khiong Yong
Publisher : John Wiley & Sons
ISBN 13 : 1119956749
Total Pages : 244 pages
Book Rating : 4.1/5 (199 download)
Download or read book 60GHz Technology for Gbps WLAN and WPAN written by Su-Khiong Yong and published by John Wiley & Sons. This book was released on 2011-08-02 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses 60 GHz technology for Gbps WLAN and WPAN from theory to practice, covering key aspects for successful deployment. In this book, the authors focus specifically on 60 GHz wireless technology which has emerged as the most promising candidate for multi-gigabit wireless indoor communication systems. 60 GHz technology offers various advantages over current or existing communications systems (e.g. huge unlicensed bandwidth worldwide, high transmit power, high frequency reuse and small form factor), which enables many disruptive applications that are otherwise difficult if not impossible to be realized at lower frequencies. The book addresses all aspects of the state-of-the-art in 60 GHz technology for high data rate wireless applications. Key Features: Comprehensive coverage from theory to practice: provides readers with a thorough technical guide of 60 GHz technology development Brings together the entire area of 60GHz technology for Gigabits per second (Gbps) WLAN and WPAN applications. Discusses practical system designs covering wide aspects such as antenna propagation, beamforming, circuit design, digital communication, signal processing, system architectures, etc. Provides up-to-date standardization activities, regulatory issues, technology development as well as future trends Includes examples and case studies for practical scenarios Contains theoretical, simulation and experimental results to demonstrate and compare the performance of various schemes (or systems) This book serves as an excellent reference for system engineers, system architects, IC designers, standard engineers, researchers, and vendor and manufacturer consumers. Technical consultants, software and application developers will also find this book of interest.
Author : Lars Josefsson
Publisher : John Wiley & Sons
ISBN 13 : 0471780111
Total Pages : 512 pages
Book Rating : 4.4/5 (717 download)
Download or read book Conformal Array Antenna Theory and Design written by Lars Josefsson and published by John Wiley & Sons. This book was released on 2006-02-10 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first comprehensive treatment of conformal antenna arrays from an engineering perspective. While providing a thorough foundation in theory, the authors of this publication provide a wealth of hands-on instruction for practical analysis and design of conformal antenna arrays. Thus, you get the knowledge you need, alongside the practical know-how to design antennas that are integrated into such structures aircrafts or skyscrapers.
Author : Ertugrul Aksoy
Publisher : BoD – Books on Demand
ISBN 13 : 1838801073
Total Pages : 164 pages
Book Rating : 4.8/5 (388 download)
Download or read book Advances in Array Optimization written by Ertugrul Aksoy and published by BoD – Books on Demand. This book was released on 2020-03-04 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to develop technology and communication necessitates the design of flexible and high-capacity radiating systems in today's communication infrastructure. In this context, antenna arrays are the ideal solution and have been one of the priority research subjects of the science community dealing with electromagnetics from past to present. Optimization of an array may be performed in various ways such as the optimization of excitation, reflector structure, feed network, etc. depending on the array structure. This book is a collection of seven research studies focused on the optimization of array structures in classical phased array or time modulation, including radiator, reflector, feed network, and radiating element optimizations.
Author :
Publisher :
ISBN 13 :
Total Pages : 1860 pages
Book Rating : 4.3/5 (243 download)
Download or read book Electrical & Electronics Abstracts written by and published by . This book was released on 1997 with total page 1860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thomas A. Milligan
Publisher : John Wiley & Sons
ISBN 13 : 0471720607
Total Pages : 632 pages
Book Rating : 4.4/5 (717 download)
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
Author : Institute of Electrical and Electronics Engineers
Publisher :
ISBN 13 :
Total Pages : 848 pages
Book Rating : 4.3/5 (91 download)
Download or read book Index to IEEE Publications written by Institute of Electrical and Electronics Engineers and published by . This book was released on 1990 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues for 1973- cover the entire IEEE technical literature.
Author : Rod Waterhouse
Publisher : Springer Science & Business Media
ISBN 13 : 1475737912
Total Pages : 427 pages
Book Rating : 4.4/5 (757 download)
Download or read book Microstrip Patch Antennas: A Designer’s Guide written by Rod Waterhouse and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: This useful tool provides the reader with a current overview of where microstrip patch antenna technology is at, and useful information on how to design this form of radiator for their given application and scenario. Practical design cases are provided for each goal.
Author : Yi Huang
Publisher : John Wiley & Sons
ISBN 13 : 0470772921
Total Pages : 378 pages
Book Rating : 4.4/5 (77 download)
Download or read book Antennas written by Yi Huang and published by John Wiley & Sons. This book was released on 2008-09-15 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical, concise and complete reference for the basics of modern antenna design Antennas: from Theory to Practice discusses the basics of modern antenna design and theory. Developed specifically for engineers and designers who work with radio communications, radar and RF engineering, this book offers practical and hands-on treatment of antenna theory and techniques, and provides its readers the skills to analyse, design and measure various antennas. Key features: Provides thorough coverage on the basics of transmission lines, radio waves and propagation, and antenna analysis and design Discusses industrial standard design software tools, and antenna measurement equipment, facilities and techniques Covers electrically small antennas, mobile antennas, UWB antennas and new materials for antennas Also discusses reconfigurable antennas, RFID antennas, Wide-band and multi-band antennas, radar antennas, and MIMO antennas Design examples of various antennas are provided Written in a practical and concise manner by authors who are experts in antenna design, with experience from both academia and industry This book will be an invaluable resource for engineers and designers working in RF engineering, radar and radio communications, seeking a comprehensive and practical introduction to the basics of antenna design. The book can also be used as a textbook for advanced students entering a profession in this field.
Author : Per-Simon Kildal
Publisher : Artech House
ISBN 13 : 160807868X
Total Pages : 478 pages
Book Rating : 4.6/5 (8 download)
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.
Author : Weng Cho Chew
Publisher : Artech House Publishers
ISBN 13 : 9781580531528
Total Pages : 0 pages
Book Rating : 4.5/5 (315 download)
Download or read book Fast and Efficient Algorithms in Computational Electromagnetics written by Weng Cho Chew and published by Artech House Publishers. This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's a cutting-edge resource that brings you up-to-date with all the recent advances in computational electromagnetics. You get the most-current information available on the multilevel fast multipole algorithm in both the time and frequency domains, as well as the latest developments in fast algorithms for low frequencies and specialized structures, such as the planar and layered media. These algorithms solve large electromagnetics problems with shorter turn around time, using less computer memory.
Author :
Publisher :
ISBN 13 :
Total Pages : 1874 pages
Book Rating : 4.3/5 (243 download)
Download or read book Science Abstracts written by and published by . This book was released on 1995 with total page 1874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
