一种介质体宽角域散射的快速分析方法  

Fast Analysis to Scattering of Dielectric Bodies in Broad Angular Domain

作　　者：刘召庆[1] 赵博[1] 刘博[1] 杨远成[1] 

机构地区：[1]西安应用光学研究所,西安710065

出　　处：《火控雷达技术》2017年第1期68-72,共5页Fire Control Radar Technology

摘　　要：本文结合渐近波形估计技术(AWE)和体积分方程矩量法(VIE-MoM)快速分析介质体的宽角域散射问题。体积分方程用来对介质目标建模,用四面体元对目标进行体剖分,采用SWG基函数模拟四面体元内的电通量密度。应用矩量法将体积分方程离散生成矩阵方程。目标的雷达散射截面(RCS)高度依赖入射波方向,应用渐近波形估计技术在给定角度对电通量密度进行泰勒展开,采用padé逼近进一步展宽角域范围。最后,数值算例表明渐近波形估计技术结合体积分方程矩量法在介质宽角域散射分析方面的准确性和高效性。Fast analysis to scattering of dielectric bodies in broad angular domain by combing asymptotic waveform evaluation （AWE） technique and volume integral equation-method of moments （VIE-MoM） is proposed. The VIE is used for modeling of dielectric target, tetrahedron element is used for volume meshing to the target, and SWG basis functions is used to simulate electric flux density in tetrahedron elements. The MoM is used for discretization of VIE to get matrix equation. As radar cross section （RCS） of target is highly dependent on the direction of incident wave, carry out Taylor expansion to electric flux density at the given angle by using AWE; and broaden angular domain further by using padé approximation. Finally, numerical examples demonstrate the accuracy and efficiency of the combination of AWE and VIE-MoM applied to the scattering analysis of dielectric bodies in broad angular domain.

关 键 词：体积分 矩量法 渐近波形估计 宽角域 

分 类 号：TN98[电子电信—信息与通信工程]