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Dual Surface Magnetic And Electric Field Integral Equations For Bodies Of Revolution In Electromagnetic Scattering
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Book Synopsis Dual-surface Magnetic- and Electric-field Integral Equations for Bodies of Revolution in Electromagnetic Scattering by : James L. Schmitz
Download or read book Dual-surface Magnetic- and Electric-field Integral Equations for Bodies of Revolution in Electromagnetic Scattering written by James L. Schmitz and published by . This book was released on 1996 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dual-surface Magnetic-field Integral Equation Solution for Bodies of Revolution by : James Leo Schmitz
Download or read book Dual-surface Magnetic-field Integral Equation Solution for Bodies of Revolution written by James Leo Schmitz and published by . This book was released on 1990 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dual Surface Electric Field Integral Equation by : Robert A. Shore
Download or read book Dual Surface Electric Field Integral Equation written by Robert A. Shore and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed analysis and solution of the problem of scattering by a perfectly electrically conducting body of revolution using the dual surface electric field integral equation (DSEFIE) is given for the first time. Scattering calculations using the DSEFIE are free from the spurious resonances that can seriously degrade the accuracy of calculations made using the conventional electric field integral equation or magnetic field integral equation. The Galerkin form of the method of moments is used to solve the DSEFIE, and the solution is given by detailed expressions suitable for computer programming. Calculations performed with a computer program of the DSEFIE solution demonstrate the removal of spurious resonances from radar cross section patterns of spheres, spheroids, and finite cylinders obtained with the conventional electric field integral equation. Cone-sphere scattering calculations show the importance of careful placement of the dual surface when the DSEFIE is applied to scatterers with narrow tips.
Book Synopsis Dual Surface Electric Field Integral Equation by :
Download or read book Dual Surface Electric Field Integral Equation written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed analysis and solution of the problem of scattering by a perfectly electrically conducting body of revolution using the dual surface electric field integral equation (DSEFIE) is given for the first time. Scattering calculations using the DSEFIE are free from the spurious resonances that can seriously degrade the accuracy of calculations made using the conventional electric field integral equation or magnetic field integral equation. The Galerkin form of the method of moments is used to solve the DSEFIE, and the solution is given by detailed expressions suitable for computer programming. Calculations performed with a computer program of the DSEFIE solution demonstrate the removal of spurious resonances from radar cross section patterns of spheres, spheroids, and finite cylinders obtained with the conventional electric field integral equation. Cone-sphere scattering calculations show the importance of careful placement of the dual surface when the DSEFIE is applied to scatterers with narrow tips.
Book Synopsis Efficient Solution for Electromagnetic Scattering Using the Dual-surface Magnetic-field Integral Equation for Bodies of Revolution by : James L. Schmitz
Download or read book Efficient Solution for Electromagnetic Scattering Using the Dual-surface Magnetic-field Integral Equation for Bodies of Revolution written by James L. Schmitz and published by . This book was released on 1995 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dual-surface Magnetic-field Integral Equation Solution for Bodies of Revolution by : James Leo Schmitz
Download or read book Dual-surface Magnetic-field Integral Equation Solution for Bodies of Revolution written by James Leo Schmitz and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integral Equation Methods for Electromagnetics by : Nobuaki Kumagai
Download or read book Integral Equation Methods for Electromagnetics written by Nobuaki Kumagai and published by Artech House Publishers. This book was released on 1990 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details the methods for solving electromagnetic wave problems using the integral equation formula. This text limits the use of mathematics to the level of standard undergraduate students and explains all the derivations and transformations of equations in detail.
Book Synopsis Integral Equations and Iteration Methods in Electromagnetic Scattering by : A. B. Samokhin
Download or read book Integral Equations and Iteration Methods in Electromagnetic Scattering written by A. B. Samokhin and published by Walter de Gruyter. This book was released on 2013-03-12 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integral Equation Methods for Electromagnetic and Elastic Waves by : Weng Chew
Download or read book Integral Equation Methods for Electromagnetic and Elastic Waves written by Weng Chew and published by Morgan & Claypool Publishers. This book was released on 2008-07-08 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integral Equation Methods for Electromagnetic and Elastic Waves is an outgrowth of several years of work. There have been no recent books on integral equation methods. There are books written on integral equations, but either they have been around for a while, or they were written by mathematicians. Much of the knowledge in integral equation methods still resides in journal papers. With this book, important relevant knowledge for integral equations are consolidated in one place and researchers need only read the pertinent chapters in this book to gain important knowledge needed for integral equation research. Also, learning the fundamentals of linear elastic wave theory does not require a quantum leap for electromagnetic practitioners. Integral equation methods have been around for several decades, and their introduction to electromagnetics has been due to the seminal works of Richmond and Harrington in the 1960s. There was a surge in the interest in this topic in the 1980s (notably the work of Wilton and his coworkers) due to increased computing power. The interest in this area was on the wane when it was demonstrated that differential equation methods, with their sparse matrices, can solve many problems more efficiently than integral equation methods. Recently, due to the advent of fast algorithms, there has been a revival in integral equation methods in electromagnetics. Much of our work in recent years has been in fast algorithms for integral equations, which prompted our interest in integral equation methods. While previously, only tens of thousands of unknowns could be solved by integral equation methods, now, tens of millions of unknowns can be solved with fast algorithms. This has prompted new enthusiasm in integral equation methods. Table of Contents: Introduction to Computational Electromagnetics / Linear Vector Space, Reciprocity, and Energy Conservation / Introduction to Integral Equations / Integral Equations for Penetrable Objects / Low-Frequency Problems in Integral Equations / Dyadic Green's Function for Layered Media and Integral Equations / Fast Inhomogeneous Plane Wave Algorithm for Layered Media / Electromagnetic Wave versus Elastic Wave / Glossary of Acronyms
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1997 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Integral Equation Method for Analyzing Electromagnetic Scattering in Layered Medium by : Yongpin Chen
Download or read book Surface Integral Equation Method for Analyzing Electromagnetic Scattering in Layered Medium written by Yongpin Chen and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Surface Integral Equation Method for Analyzing Electromagnetic Scattering in Layered Medium" by Yongpin, Chen, 陈涌频, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Surface integral equation (SIE) method with the kernel of layered medium Green's function (LMGF) is investigated in details from several fundamental aspects. A novel implementation of discrete complex image method (DCIM) is developed to accelerate the evaluation of Sommerfeld integrals and especially improve the far field accuracy of the conventional one. To achieve a broadband simulation of thin layered structure such as microstrip antennas, the mixed-form thin-stratified medium fast-multipole algorithm (MF-TSM-FMA) is developed by applying contour deformation and combining the multipole expansion and plane wave expansion into a single multilevel tree. The low frequency breakdown of the integral operator is further studied and remedied by using the loop-tree decomposition and the augmented electric field integral equation (A-EFIE), both in the context of layered medium integration kernel. All these methods are based on the EFIE for the perfect electric conductor (PEC) and hence can be applied in antenna and circuit applications. To model general dielectric or magnetic objects, the layered medium Green's function based on pilot vector potential approach is generalized for both electric and magnetic current sources. The matrix representation is further derived and the corresponding general SIE is setup. Finally, this SIE is accelerated with the DCIM and applied in quantum optics, such as the calculation of spontaneous emission enhancement of a quantum emitter embedded in a layered structure and in the presence of nano scatterers. DOI: 10.5353/th_b4775283 Subjects: Electromagnetic waves - Scattering - Mathematical models
Book Synopsis Application of Integral Equation and Finite-difference Methods to Electromagnetic Scattering by Two-dimensional and Body of Revolution Geometries by : James Joseph Kattoor
Download or read book Application of Integral Equation and Finite-difference Methods to Electromagnetic Scattering by Two-dimensional and Body of Revolution Geometries written by James Joseph Kattoor and published by . This book was released on 1990 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical and numerical studies of electromagnetic scattering and radiation from perfectly conducting as well as dielectric bodies are of great importance in the design of various systems, such as airborne targets and antennas. This thesis is an attempt to investigate integral equation and partial differential equation techniques as tools for numerical solution of such problems. These techniques are analyzed and some improvements to existing methods are presented. Some scattering problems involving two-dimensional and body of revolution geometries are solved using these techniques to demonstrate their capabilities and to point out their limitations. The first topic that this thesis addresses is the method of moments technique. To demonstrate the techniques developed, electromagnetic scattering from perfectly conducting as well as dielectric bodies of revolution is considered. There are two major issues addressed in this thesis, in this context. First, the use of quasi-entire-domain basis functions, as an alternative to the more traditional sub-sectional basis functions, is considered. It is shown that using the quasi-entire-domain basis functions results in a reduction in the size of the matrix that needs to be solved. The second major topic that Chapter 2 considers is the problem of electromagnetic scattering from layered and partially coated bodies of revolution. The formulation used to solve these problems as well as some results, are presented. The partial differential equation technique that this thesis considers is the finite-difference method. Chapter 3 discusses the finite-difference method in the frequency domain, while Chapter 4 focuses on the solution of Maxwell's equations in the time domain. Chapter 3 solves the problem of scattering by a conducting body of revolution using the finite-difference method in the frequency domain. The procedure outlined uses the coupled azimuthal potentials introduced by Morgan, Chang, and Mei (20) to obtain two coupled partial differential equations. These equations are then solved over a domain discretized using a boundary-fitted curvilinear coordinate system. The main contribution of this thesis in this respect is the application of the boundary-fitted curvilinear coordinate system to this class of problems. It is demonstrated that using this system eliminates the need for using the staircase approximation that is typically required in the finite-difference methods. Chapter 4 focuses on circumventing the problem of staircase approximation that is traditionally used to model material boundaries in finite-difference time-domain algorithms. In this context, two methods are presented. The first one, referred to in this thesis as the modified stencil approach, allows the use of arbitrarily-shaped quadrilateral grids. The second is similar to the boundary-fitted curvilinear coordinate approach presented in Chapter 3. The methods are compared and contrasted, and the advantages and disadvantages of each method are pointed out.
Book Synopsis Electromagnetic Scattering by Surface of Arbitrary Shape by : Donald R. Wilton
Download or read book Electromagnetic Scattering by Surface of Arbitrary Shape written by Donald R. Wilton and published by . This book was released on 1980 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electric field integral equation (EFIE) is used with the moment to develop a simple and efficient numerical procedure for treating problems of scattering by arbitrarily-shaped objects. The objects are modeled for numerical purposes by planar triangular surface patch models. Because the EFIE formulation is used, the procedure is applicable to both open and closed bodies. Crucial to the formulation is development of a set of special subdomain basis functions defined on pairs of adjacent triangular patches. The basis functions yield a current representation which is free of line or point charges at subdomain boundaries. A second approach using the magnetic field integral equation (MFIE) and employing the same basis functions is also developed. Although the MFIE applies only to closed bodies, the moment matrix of the MFIE is also needed in dielectric scattering problems and in the so-called combined field integral equation used to eliminate difficulties with internal resonances present in the MFIE and EFIE formulations. The EFIE approach is applied to the scattering problems of plane wave illumination of a flat square plate, a bent square plate, a circular disk, and a sphere. Comparisons of surface current densities are made with previous computations or exact formulations and good agreement is obtained in each case. The MFIE approach is also applied to the sphere and reasonable agreement with exact calculations is obtained.
Book Synopsis Electromagnetic Scattering from a Homogeneous Body of Revolution by : Joseph R. Mautz
Download or read book Electromagnetic Scattering from a Homogeneous Body of Revolution written by Joseph R. Mautz and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis and Numerical Solution of an Integral Equation Method for Electromagnetic Scattering from a Cavity in a Ground Plane by : Eric T. Howe
Download or read book Analysis and Numerical Solution of an Integral Equation Method for Electromagnetic Scattering from a Cavity in a Ground Plane written by Eric T. Howe and published by . This book was released on 2001-09-01 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research the electromagnetic scattering of a plane wave from a two-dimensional cavity embedded in an infinite, perfectly conducting ground plane is investigated. The plane wave is assumed to be under transverse electric (TE) polarization with respect to the x-axis. The cavity may be empty or filled with an arbitrary homogeneous, lossy material. A coupled set of scalar integral equations that govern the electromagnetic scattering is implemented. An approximate solution to the scalar integral equations is found via a Method of Moments (MoM) algorithm. The algorithm is implemented in a computer code, and approximations to the total magnetic field on the cavity surface and aperture as well as the normal derivative of the total magnetic field on the cavity aperture are obtained. These fields are then used to calculate the two-dimensional monostatic RCS signatures of various test cavities. The numerical results from the algorithm are shown to agree well with the RCS signatures calculated by other well-known methods and published results. In addition to being accurate, the algorithm is very computationally efficient. The process results in simply solving a relatively small, well-conditioned matrix system for each incident angle to produce the unknown fields.
Book Synopsis Journal of the Optical Society of America by :
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1994 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electromagnetic Scattering by an Object Embedded in a Stratified Medium by : Maurice I. Sancer
Download or read book Electromagnetic Scattering by an Object Embedded in a Stratified Medium written by Maurice I. Sancer and published by . This book was released on 1980 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: A general electromagnetic scattering formulation is presented for the situation in which a perfectly conducting body is embedded in a horizontally or radially stratified medium. The electric field integro-differential equation (EFIDE) and magnetic field integral equation (MFIE) are derived for the determination of the surface current density induced on the body by a general class of sources. Expressions are also presented for the use of the current density to determine the electric and magnetic fields scattered by the body into any layer of the medium. Detailed expressions for the MFIE and EFIDE are presented for the horizontally stratified two-layered medium configuration corresponding to the object being in a vacuum half-space above a lossy half-space. A computer code, which is an extended version of NEC-2A, is developed for the solution of the two-layer MFIE for a situation where the object is a model of an aircraft. Results corresponding to special cases obtained by this computer code are compared to experimental data as well as to numerical results obtained by another independently developed computer code.
