基于半空间FDTD的近远场外推方法:TE情形  

Near-to Far-zone Transformation in Half-space by FDTD:TE Case

作　　者：姜彦南 杨利霞[2] 于新华 

机构地区：[1]广西无线宽带通信与信号处理重点实验室,广西桂林541004 [2]江苏大学计算机科学与通信工程学院,江苏镇江212013

出　　处：《计算物理》2013年第4期554-558,共5页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(61001020;61072002;61161002);国家重大科学仪器设备开发专项(2011YQ05006007);广西自然科学基金(2010GXNSFB013049);广西信息科学实验中心资助项目

摘　　要：研究基于半空间时域有限差分(FDTD)计算中TE情形的远区散射场计算方法.先将半空间Green函数代入势函数,推导远区纵向磁场的计算公式,对各空间内电磁流和对应的相位进行详细分析.再计算两个半空间模型的远区散射场,结果表明:该方法是正确和有效的.针对日本96式装甲车的计算发现,单站雷达探测系统位于战车正上方时具有最好的探测效果.A method to calculate far-zone scattering fields of a target in half-space excited by TE wave is proposed. Formulas of Green＇ s function in a pair of vector potentials is derived, by which far-zone scattering field Hz can be calculated. Core of the method is calculation of electric and magnetic currents and their spatial phase in near-zone, which is elaborated. Far fields of an example are considered, which validates the method. Finally monostatic RCS of Type 96 armored vehicle is calculated. It is found that the maximum RCS is reached at head-in incidence case.

关 键 词：TE波 时域有限差分方法 半空间 远区散射场 

分 类 号：TN011[电子电信—物理电子学]