Electromagnetic Waves
1 - 10 of 61 item found
- Sort by: Title A - Z
- Newest titles first
-
2008+ Solved Problems in Electromagnetics
- Author(s): Syed A. Nasar
- Publication Year 2008
- + Show Description
-
Hide details
-
This extremely valuable learning resource is for students of electromagnetics and those who wish to refresh and solidify their understanding of its challenging applications. Problem-solving drills help develop confidence, but few textbooks offer the answers, never mind the complete solutions to their chapter exercises. In this text, noted author Professor Syed Nasar has divided the book's problems into topic areas similar to a textbook and presented a wide array of problems, followed immediately by their solutions.
-
Adaptive Array Principles
- Author(s): J. E. Hudson
- Publication Year 1981
- + Show Description
-
Hide details
-
Adaptive arrays are a radical departure from conventional thinking in antenna design, offering substantial improvements in performance over fixed pattern antennas in environments that include severe interference and jamming. They achieve this because they are designed to steer nulls automatically at noise sources of unknown or variable direction and generally to modify their beampatterns to optimise performance. Adaptive array processing is applicable in most systems that exploit wave propagation; typical uses being radar, active and passive sonar, radio communication links, and radio monitoring. Although sensors and hardware for different applications vary, the same optimality criteria are used throughout and similar algorithms may be employed. This book develops the concepts underlying the design of adaptive arrays from first principles and is directed at research workers and designers whose mathematical background requires refurbishment in the special techniques that have accumulated around the field, often to the obscuration of the simple basic ideas. The topics treated include: single multiple null steering; derivation of the weighting coefficients in an array that maximises signal to noise ratio; online algorithms for achieving these coefficients using gradient methods based on correlators and coefficient peterbation; direct estimation of optimum coefficients by covariance matrix inversion and recursive techniques; prevention of null steering at the desired source and control over the main lobe shape; minimisation of the number of variable coefficients in suboptimal implementations.
-
Advanced Electromagnetic Analysis of Passive and Active Planar Structures
- Author(s): Tullio Rozzi; Marco Farinai
- Publication Year 1999
- + Show Description
-
Hide details
-
With increasing operating frequencies of digital electronic devices, limitations are becoming evident in existing modelling techniques. This book acts as a bridge between the mathematical abilities of the pure EM theorist and those of the FET circuit modeller.
-
Analysis of Metallic Antennas and Scatterers
- Author(s): B. D. Popović; B. M Kolundźija
- Publication Year 1994
- + Show Description
-
Hide details
-
Most antennas are assembled from conducting surfaces and wires. The usual approach to numerical analysis of such structures is to approximate them by small surface or wire elements, with simple current approximation over the elements (the so-called subdomain approach), which requires a large amount of computer storage. This book describes a novel general entire-domain method for the analysis of metallic antennas and scatterers which enables the solution of a very wide class of problems to be obtained using computers of relatively modest capability. Antenna-design engineers, scientists and graduate students interested in the analysis and design of electrically small and medium-sized metallic antennas and scatterers will find in this book a self-contained and extremely powerful tool that circumvents most difficulties encountered in other available methods.
-
Antennas: Fundamentals, design, measurement
- Author(s): Lamont V. Blake; Maurice W. Long
- Publication Year 2009
- + Show Description
-
Hide details
-
This is a professional level, introductory text on antenna principles, design, analysis, and measurements. It is especially suitable for persons who wish to improve their knowledge of antenna principles, concept design, performance analyses, and measurements. It is not a cookbook-like catalog for antenna design, nor does its understanding require a familiarity with electromagnetic theory, sophisticated mathematics, or complex computer techniques. The 3rd Edition updates and expands the original text by Lamont Blake, which was prepared at the undergraduate engineering, science, or technology level. For providing technical depth at the senior and graduate university levels, additions to the original book include a greatly expanded Chapter 7 on Antennas with Special Properties, a brand new Chapter 8 on Electronically Steered Arrays, and a revised Chapter 9 on Measurements. Also new to this edition are numerous appendices to the updated text and a CD-ROM with sample computer analyses. Reader knowledge assumes familiarity with basic college physics and mathematics. Computer computations use Mathcad® software, which can be read and used by persons without prior computer programming knowledge. The book is therefore suitable for entry-level as well as the more experienced professionals who desire to expand their understanding of and capabilities for antenna principles, analyses, measurements, and design.
-
Aperture Antennas and Diffraction Theory
- Author(s): E. V. Jull
- Publication Year 1981
- + Show Description
-
Hide details
-
Two alternative methods of aperture antenna analysis are described in this book.
-
Approximate Boundary Conditions in Electromagnetics
- Author(s): T. B. A. Senior; J. L. Volakis
- Publication Year 1995
- + Show Description
-
Hide details
-
Non-metallic materials and composites are now commonplace in modern vehicle construction, and the need to compute scattering and other electromagnetic phenomena in the presence of material structures has led to the development of new simulation techniques. This book describes a variety of methods for the approximate simulation of material surfaces, and provides the first comprehensive treatment of boundary conditions in electromagnetics. The genesis and properties of impedance, resistive sheet, conductive sheet, generalised (or higher order) and absorbing (or non-reflecting) boundary conditions are discussed. Applications to diffraction by numerous canonical geometries and impedance (coated) structures are presented, and accuracy and uniqueness issues are also addressed, high frequency techniques such as the physical and geometrical theories of diffraction are introduced, and more than130 figures illustrate the results, many of which have not appeared previously in the literature. Written by two of the authorities m the field, this graduate-level text should be of interest to all scientists and engineers concerned with the analytical and numerical solution of electromagnetic problems.
-
Asymptotic and Hybrid Methods in Electromagnetics
- Author(s): F. Molinet; I. Andronov; D. Bouche
- Publication Year 2005
- + Show Description
-
Hide details
-
Asymptotic methods provide considerable physical insight and understanding of diffraction mechanisms and are very useful in the design of electromagnetic devices such as radar targets and antennas. However, difficulties can arise when trying to solve problems using multipole and asymoptotic methods together, such as in radar cross section objects.
-
Channels, Propagation and Antennas for Mobile Communications
- Author(s): Rodney Vaughan; Jørgen Bach-Anderson
- Publication Year 2003
- + Show Description
-
Hide details
-
This exceptional book introduces the reader to the principles, theory and applications of physical layer wireless/mobile communications. applicators and millimetric antennas. The book emphasises the basic principles needed to establish an understanding of this technology, whilst treating the tools required - such as the mathematics and statistics - in the manner of a practical handbook, thus avoiding detailed derivations.
-
Corrugated Horns for Microwave Antennas
- Author(s): P. J. B. Clarricoats; A. D. Olver
- Publication Year 1984
- + Show Description
-
Hide details
-
Corrugated horns are widely used and highly efficient, especially in their use as feeds for microwave reflector antennas. This book is devoted to the theory and design of corrugated horns and scalar feeds and explains why hybrid mode feeds are ideal feeds for reflectors.

