电大散射问题的复合场积分方程快速傅里叶变换算法

J4 ›› 2009, Vol. 36 ›› Issue (3): 463-467.

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Fast Fourier transform algorithm for the combined integral equation to solve electrically large scattering problems

CHEN Zeng-shuai;LAI Ben;HUANG Chun-ming;LIANG Chang-hong

(Key Lab. of Antennas and Microwave Technology, Xidian Univ., Xi'an 710071， China)

Received:2008-01-14 Revised:2008-02-29 Online:2009-06-20 Published:2009-07-04
Contact: CHEN Zeng-shuai E-mail:zengshuaichen@gmail.com

Abstract

Abstract:

A new fast Fourier transform-based algorithm is introduced for solving electrically large scattering problems. The entire computational domain is partitioned to near and far field couplings. The near field coupling can be computed by the traditional method of moments (MoM); while the impedance elements of far field coupling are characterized as a Toeplitz matrix by interpolating Green's function on a regular Cartesian grid, and the matrix-vector products are accelerated by fast Fourier transforms. Otherwise, the combined field integral equation (CFIE) eliminates the interior resonance problem suffered by the electrical field integral equation (EFIE) and the magnetic field integral equation (MFIE), and maintains the accuracy of the MoM. The iteration number for solving matrix equations is reduced to 10％ that of EFIE.

Key words: fast Fourier transforms, combined integral equation, fast algorithm, electromagnetic wave scattering

CLC Number:

TN011

CHEN Zeng-shuai;LAI Ben;HUANG Chun-ming;LIANG Chang-hong. Fast Fourier transform algorithm for the combined integral equation to solve electrically large scattering problems[J].J4, 2009, 36(3): 463-467.

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Fast Fourier transform algorithm for the combined integral equation to solve electrically large scattering problems

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