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《Journal of Southeast Univwrsity(Natural Science Edition)》 2002-02
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Improvement of MoM-CG-FFT scheme for EM scattering from an infinite dielectric cylinder

Zhou Houxing Hong Wei (State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China)  
Two numerical schemes for the electromagnetic scattering from an infinite dielectric cylinder based on the hybrid technique of moment method, conjugate gradient method and fast Fourier transform (MoM CG FFT) are investigated. One of the schemes adopts the integral equation with equivalent current as an unknown function, whereas the other uses the integral equation with total electric field as an unknown function. Characteristics of each scheme are discussed, shortcomings are pointed out and a new scheme is proposed. In the new scheme, discrete grids are generated by means of a rectangle domain in which the cross section of the dielectric cylinder is situated, but the algebraic system is set up on the cross section of the dielectric cylinder. The scattering question considered is efficiently solved by MoM CG FFT. The procedure of the new method is presented in detail. Numerical results are given for various structures, which demonstrate superiority of the new scheme.
【Fund】: 国家杰出青年基金资助项目 (6962 5 10 2 )
【CateGory Index】: TN957.52
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