弱耗散均匀回旋介质椭圆柱体的电磁散射

摘要

分析了弱耗散型均匀回旋介质椭圆柱体的电磁散射特性．基于平面波谱的积分方程以及马丢函数的级数展开式，以横电型（TE）平面波为例，导出了弱耗散均匀回旋介质椭圆柱内场及其单位长度的雷达散射截面（RCS）的表达式．为了解决马丢函数子程序计算复数的难题，采用泰勒级数的一级近似将复数转换为实数运算．计算了部分数值并讨论了弱耗散介质对雷达散射截面的影响．%A solution to the scattering properties by a weekly lossy homogeneous gyrotropic elliptic cylinder is obtained. The transmitted field of the gyrotropic elliptic cylinder under a transverse-electric illumination is presented. A first-order Taylor expansion is introduced to treat the Mathieu functions of complex arguments. The result is in agreement with that available as expected when the elliptic cylinder degenerates to a gyrotropic circular one.