Fast analysis of electromagnetic scattering of 3D dielectric bodies by use of the loose GMRES-FFT method |
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| Authors: | D Z Ding R S Chen Z H Fan Edward K N Yung C H Chan |
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| Affiliation: | 1. Department of Communication Engineering , Nanjing University of Science and Technology , Nanjing 210094, China;2. Department of Electronic Engineering , City University of Hong Kong , Kowloon, Hong Kong, China |
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| Abstract: | In this paper, electromagnetic wave scattering is analysed by the efficient Krylov subspace iterative fast Fourier transform (FFT) technique in terms of the electric field integral equation (EFIE) for a dielectric body of general shape, inhomogeneity and anisotropy. However, when the permittivity of the scatter becomes large, the convergence rate of Krylov subspace iterative methods slows down. The loose generalized minimum residual (LGMRES) method is therefore used to accelerate the iteration. As a result, good convergence improvement is achieved for high permttivity cases. |
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| Keywords: | Electromagnetic wave scattering Krylov subspace iterative methods Fast Fourier transform LGMRES |
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