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Numerical analysis of scattering fro...

Moheb, Hamid.

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Numerical analysis of scattering from certain conducting and dielectric bodies of arbitrary shape.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Numerical analysis of scattering from certain conducting and dielectric bodies of arbitrary shape./
Author:	Moheb, Hamid.
Description:	163 p.
Notes:	Source: Dissertation Abstracts International, Volume: 53-01, Section: B, page: 0344.
Contained By:	Dissertation Abstracts International53-01B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NN63282
ISBN:	9780315632820

Numerical analysis of scattering from certain conducting and dielectric bodies of arbitrary shape.
Moheb, Hamid.

Numerical analysis of scattering from certain conducting and dielectric bodies of arbitrary shape. - 163 p.

Source: Dissertation Abstracts International, Volume: 53-01, Section: B, page: 0344.

Thesis (Ph.D.)--University of Manitoba (Canada), 1990.

A numerical method is developed to study the electromagnetic scattering from three-dimensional geometries, which is a generalization of the method previously used for bodies of revolution. On the object's surface two orthogonal tangent vectors are defined. Along one, the surface currents are represented by discrete triangular basis functions and along the other by a finite set of entire domain basis functions. To enable the latter expansion two different techniques are adopted. In one, called the method of coordinate transformation, the object's cross-section is conformally transformed onto a circle, and cylindrical basis functions are selected in the new space. In the second technique Fourier type basis functions are used directly in the physical coordinates of the object. The developed methods are then applied to study the scattering from geometries such as cubes and plates. The behavior of the solutions with different number of modes are investigated to determine their coupling. The conformal transformation method is applicable to any geometry of arbitrary cross-section, but it needs the transformation function to be useful. The direct method, on the other hand, does not have such a restriction. Both methods are, however, limited in use to small objects when their size is in order of the wavelength.

ISBN: 9780315632820Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Numerical analysis of scattering from certain conducting and dielectric bodies of arbitrary shape.
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100 1 $a Moheb, Hamid. $3 1924438
245 1 0 $a Numerical analysis of scattering from certain conducting and dielectric bodies of arbitrary shape.
300 $a 163 p.
500 $a Source: Dissertation Abstracts International, Volume: 53-01, Section: B, page: 0344.
502 $a Thesis (Ph.D.)--University of Manitoba (Canada), 1990.
520 $a A numerical method is developed to study the electromagnetic scattering from three-dimensional geometries, which is a generalization of the method previously used for bodies of revolution. On the object's surface two orthogonal tangent vectors are defined. Along one, the surface currents are represented by discrete triangular basis functions and along the other by a finite set of entire domain basis functions. To enable the latter expansion two different techniques are adopted. In one, called the method of coordinate transformation, the object's cross-section is conformally transformed onto a circle, and cylindrical basis functions are selected in the new space. In the second technique Fourier type basis functions are used directly in the physical coordinates of the object. The developed methods are then applied to study the scattering from geometries such as cubes and plates. The behavior of the solutions with different number of modes are investigated to determine their coupling. The conformal transformation method is applicable to any geometry of arbitrary cross-section, but it needs the transformation function to be useful. The direct method, on the other hand, does not have such a restriction. Both methods are, however, limited in use to small objects when their size is in order of the wavelength.
520 $a The developed methods are then extended to treat dielectric geometries of arbitrary shape. The surface integral equations are formulated in terms of the equivalent electric and magnetic currents over the object's surface. The surface currents are obtained from the tangential components of the fields and related to the integral operators of the conducting objects. The resulting integral equations are solved similarly.
520 $a Finally, the developed techniques are also applied to the antenna problems, in particular, for handling the radiation from rectangular waveguides. An x-directed dipole is used as a source of excitation and the radiation characteristics of the rectangular waveguides are determined.
590 $a School code: 0303.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, Electricity and Magnetism. $3 1019535
690 $a 0544
690 $a 0607
710 2 $a University of Manitoba (Canada). $3 1018707
773 0 $t Dissertation Abstracts International $g 53-01B.
790 $a 0303
791 $a Ph.D.
792 $a 1990
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NN63282