A comparative study of a class of FFT-based methods for the computation of electromagnetic scattering from 2 and 3D objects

Author

Tran, T.V. ; McCowen, A.

Author_Institution

Univ. Coll. of Swansea, UK

fYear

1991

fDate

25-27 Nov 1991

Firstpage

238

Lastpage

240

Abstract

A systematic comparison of three methods based on the different ways of generating variational basis functions in van den Berg´s algorithm is conducted. The MSIT is a matrix interpretation of the spectral iteration technique; the CGFFT (conjugate gradient fast Fourier transform) is obtained by an appropriate choice of basis function. A third choice, based on a generalized Neumann series (GNS) expansion of the inverse of the integral equation operator is proposed. Test cases in both 2 and 3D for a wide range of dielectric problems show that the GNS is more efficient that either the MSIT or the CGFFT irrespective of material composition, size or shape

Keywords

conjugate gradient methods; electrical engineering computing; electromagnetic wave scattering; fast Fourier transforms; integral equations; physics computing; 2D objects; 3D objects; CGFFT; FFT-based methods; GNS expansion; MSIT; computation; conjugate gradient fast Fourier transform; dielectric problems; electromagnetic scattering; generalized Neumann series; integral equation operator; inverse; matrix interpretation; spectral iteration technique; van den Berg algorithm; variational basis functions;

fLanguage

English

Publisher

iet

Conference_Titel

Computation in Electromagnetics, 1991., International Conference on

Conference_Location

London

Print_ISBN

0-85296-529-X

Type

conf

Filename

140162