用于平面单轴对称结构电磁波散射的减元技术

大容量与长计算时间的要求，是当前限制矩量法应用的主要障碍。因此，如何利用散射体和几何对称特征，有效地降低求解散射问题所需的存储空间和减少计算时间，具有重要的理论和实际意义。对具有轴对称的散射体，通过引入对称镜像分解，能够使总的所需矩阵阶数降至直接求解的1／2，运算时间缩减为直接求解的1／4；同时还给出了分解实现的数学公式以及分解原理。

Reducing Technique for Two Dimensional EM Scattering Problem with Single Axis Symmetric Structure

Big storage and long calculation time requirements are main obstacles for the development of moment method. Therefore, how to efficiently use geometric symmetric feature of scattering structures to reduce computer storage and calculation time for solving the scattering problems is significant in theory and application. In this paper, for the scattering structure with single axial symmetry, a new approach based on moment method is proposed by introducing imaginary decomposition. With this approach, the dimensions of matrix can be reduced to half of the ones in direct calculation, and three quarter calculation time can be saved. Meanwhile, the formula for decomposition and the decomposition theory are also presented.