Electromagnetic Scattering by Conducting by Bodies of Revolution-- Solution Using Sub-Domain and Entire-Domain Basis Functions PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 43
Book Description
In this work, the problem of electromagnetic scattering of a plane wave incident on a conducting body of revolution is considered. The body is assumed to be situated in infinite homogeneous space. The problem is solved using the method of moments. Use of two different types of expansion and testing functions, namely, sub-domain type and entire-domain type is considered. Results obtained using sub-domain pulse functions and entire-domain Gaussian functions are presented. The relative advantages and disadvantages of each type of basis functions is discussed. Keywords: Electromagnetic scattering, Method of moments, Bodies of revolution, Entire domain functions, Subdomain functions.
Author: Publisher: ISBN: Category : Languages : en Pages : 43
Book Description
In this work, the problem of electromagnetic scattering of a plane wave incident on a conducting body of revolution is considered. The body is assumed to be situated in infinite homogeneous space. The problem is solved using the method of moments. Use of two different types of expansion and testing functions, namely, sub-domain type and entire-domain type is considered. Results obtained using sub-domain pulse functions and entire-domain Gaussian functions are presented. The relative advantages and disadvantages of each type of basis functions is discussed. Keywords: Electromagnetic scattering, Method of moments, Bodies of revolution, Entire domain functions, Subdomain functions.
Author: Branko M. Kolund?zija Publisher: Artech House ISBN: 9781580537667 Category : Science Languages : en Pages : 428
Book Description
Annotation This practical, new book provides a much wider choice of analytical solutions to problems faced by antenna design engineers and researchers working in electromagnetic modeling. Based on leading-edge method-of-moments procedures, the book presents new theories and techniques that help professionals optimize computer performance in numerical analysis of composite metallic and dielectric structures in the complex frequency domain. For the first time, comparisons and new combinations of techniques bring the elements of flexibility, ease of implementation, accuracy, and efficiency into clear focus for all practitioners.
Author: A. Chang Publisher: ISBN: Category : Languages : en Pages : 59
Book Description
An alternative to directly inverting the large MoM matrix is to recast the problem in a form that is suitable for solution via iterative schemes. Although the use of iterative methods may enable one to treat scatterers that are an order of magnitude larger electrically, a close examination of them shows that most of them are not well-suited for handling multiple excitations in an efficient manner. In this report some variational-iteration schemes based on the use of prechosen entire domain basis functions that are suitable not only for treating larger bodies but for handling multiple incident angles as well are suggested. It is shown that, for this type of variational iteration schemes, the choice of an initial guess plays an important role in achieving a rapid convergence. Also, in an effort to further improve the convergence, a hybrid technique, where the method of moments is utilized to generate better gradient vectors in the iterative procedure, is developed. A simple case of scattering from a perfectly conducting or resistively-loaded strip is use to demonstrate the effectiveness of the methods. Keywords: Electromagnetic scattering, Iterative methods, Radar cross sections, and Resistive strips. (KR).
Author: Lal Chand Godara Publisher: CRC Press ISBN: 1351835920 Category : Technology & Engineering Languages : en Pages : 1043
Book Description
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.
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Author: Branko M. Kolund?zija
Author: A. Chang
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Author: Lal Chand Godara
Author: James L. Schmitz