FINITE DIFFERENCE METHOD FOR EM SCATTERING FROM PERFECT CONDUCTING CYLINDERS
理想导电柱体电磁散射的有限差分法

A new numerical method for electromagnetic scattering by two-di-mensional bodies is presented. Radietion boundary condition (RBC) is applied to confint electromagnetic scanering problem in infinite spice to finite space. Coupled with RBC and cylinder surface boundary condition, Helmboltz equation in the finite region is solved numrically by the finite difference method. Thus the distribution of induced surface carrents on perfect conducting cylinder and near ficlds can be obtained. Computational results for both polanzations of cirrular, elliptical and square clinders are presented. These results are in oxcellent agrccment with those obtained by the eigenfunction expansion method or momenr method and much better than the results of OSRC method. This method may be a valid alternative to the traditional analytical and numerical methods.