Title :
Fast analysis of electromagnetic scattering of 3-D dielectric bodies with augmented GMRES-FFT method
Author :
Rui, L. ; Chen, R.S. ; Fan, Z.H. ; Yung, Edward K N ; Chan, C.H. ; Nie, Zaiping ; Hu, Jun
Author_Institution :
Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., China
Abstract :
The problem of electromagnetic scattering by three-dimensional dielectric bodies is formulated in terms of a weak formulation of the domain-integral equation. Applying Galerkin´s method with rooftop functions as basis and testing functions, the integral equation can be solved by the Krylov-subspace iterative fast Fourier transform (FFT) methods. However, poor convergence is observed when the relative permittivity of the scatterer becomes large. In order to relieve this trouble, an augmented generalized minimum residual method (AGMRES) is presented. Comparisons between several typical iterative methods are made to show the efficiency of our proposed method.
Keywords :
Galerkin method; dielectric bodies; electric field integral equations; electromagnetic wave scattering; fast Fourier transforms; iterative methods; 3D dielectric bodies; FFT method; Galerkin method; Krylov-subspace iterative fast Fourier transform; augmented GMRES-FFT method; basis-testing function; domain-integral equation; electromagnetic scattering; generalized minimum residual method; relative permittivity; rooftop function; Convergence; Dielectrics; Electromagnetic analysis; Electromagnetic scattering; Fast Fourier transforms; Integral equations; Iterative methods; Moment methods; Permittivity; Testing; Augmented generalized minimum residual method (AGMRES); Krylov-subspace iterative methods; electromagnetic wave scattering; fast Fourier transform (FFT);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2005.858833
