基于电场矢量差分的二维导体柱散射分析

Analysis of Two-dimensional Conducting Cylinder Scattering Based on Differential Formulation of Electric Field Vector

基于电场的矢量Helmholtz方程,提出了一种分析二维导体柱散射的高效算法;给出了二维导体柱边界条件的电场矢量差分方程,以及用于计算导体表面电流的电场矢量差分表达式;采用了二阶Mur’s吸收边界条件和场平均吸收条件截断网格。用所提方法分析了无限长理想导体方柱对平面电磁波的散射,其结果与矩量法的吻合很好。

Based on the vector Helmholtz equation of electric field, an efficient numerical method is presented for the analysis of two-dimensional conducting cylinder scattering. The electric field finite difference equations of the two-dimensional conducting cylinder boundary conditions are derived as well as those of the surface current. The Mur＇ s absorbing boundary conditions （ABCs） of the second order and the ABCs based on the field average are applied at the truncation boundary nodes. The scattering from two-dimensional conducting rectangular Cylinder is analyzed with the proposed method. The results are in good agreement with those of MoM.