介质柱电磁极化散射的计算和分析

The Calculation and Analysis of EM Polarization Scattering of Dielectric Cylinder

本文首次给出柱形体的一种有价值的极化散射矩阵 Ss定义 ,Ss具有六个自由度 ,它包含了柱形体散射的所有信息 ,并给出计算平行极化 RCS的垂直极化 RCS等公式。从 Ss也易于导出线极化基极化散射矩阵 Sl 和圆极化基极化散射矩阵 Sc等。在此基础上本文将 Mo M- CGM- FFT混合技术扩展用于分析任意截面的非均匀介质柱的电磁极化散射问题。由于该混合技术的应用 ,大大降低了所需计算机内存和 CPU时间 ,提高了计算效率。本文以介质板柱体的极化散射为例进行了计算 ,所得结果与理论结果以及其它文献中的精确结果进行比较 ,吻合很好。并在此基础上对柱形体的极化散射进行了分析 ,得出几个一般性结论。

A new valuable definition of EM polarization scattering matrix S s for cylinder,which has six freedoms and includes all information of the scattering wave of cylindrical scatterer,is presented.Some formulae of calculating the parallel polarization RCS and the vertical polarization RCS etc. is given.EM scattering matrix S l based on linear polarization and EM scattering matrix S c based on circular polarization can be easily derived from the six freedom matrix S s .By the mixed technique of MoM CGM FFT and the definition of S s ,the EM polarzation scattering problem of dielectric cylinder with arbitrary cross section is to deal with in this paper,so the computer memory and CPU time are largely reduced.And the EM scattering problem can be efficiently calculated.Here the EM polarization scattering problem for a dielectric cylinder has been calculated,and the results coincide well with the theoretical results or the results published in the literature.Some conclusions on EM polarization scattering problem of dielectric cylinder have been obtained also.