广义Cauchy技术加速MOM对介质柱单站RCS的快速求解

Fast Calculation of Mono-Station RCS of Dielectric Cylinders Based on the Generalized Cauchy Technique

本文基于 Cauchy技术和矩量法 (MOM)快速预测任意截面形状、非均匀介质柱体的单站雷达散射截面 (RCS)。首先采用 MOM求解介质柱的电场积分方程 ,得到介质柱在某一给定方向入射波照射下的各低阶矩量的极化电流 ,然后利用 Cauchy技术获得用有理函数模型表示的、在任意角度入射波照射下的极化电流 ,进而计算出 RCS的宽角响应。计算结果表明 ,Cauchy技术完全能逼近 MOM精确计算的曲线 。

The method of moments (MOM) in conjunction with the Cauchy technique is applied to predict the mono station radar cross section (RCS) pattern of an arbitrarily shaped two dimensional dielectric cylinder. The electric field integral equation (EFIE) of a dielectric cylinder irradiated at a given direction by radar electromagnetic (EM) wave is solved using MOM to obtain the low order moments of the polarization current of the dielectric cylinder. In the generalized Cauchy technique, the polarization current is expanded to a rational function. Using the rational function, the polarization current is obtained at any angle within the angular range, which is in turn used to calculate RCS of the 2 D dielectric cylinder. It was observed that Cauchy technique could result in considerable CPU time saving.