摘要
本文研究埋藏在平面分层媒质中的二维非均匀结构的电磁散射分析方法和散射特性。在推导平面分层介质中电流丝辐射的Green函数的基础上,建立非均匀结构相对于分层媒质的等效电流所产生散射场的电场积分方程,进而在离散的条件下求解。利用文中提出的方法,对于不同介质目标的散射进行了计算,并比较了埋藏深度、周围介质、分层结构等因素对埋藏目标散射特性的影响。
Direct TM-Scattering problem of two-dimensional inhomogeneities buried in a loosy stratified medium is presented. Analysis work mainly consists of two parts: one is to derivate the Green's function of a filament buried in a loosy stratified medium, another is to constitute a electric field integral equation of an equivalent current caused by the differences between the inhomogeneities and the stratified medium. Based on these works, illustrative numerical results are given to model inhomogeneous underground tubes embedded in a stratified medium, and to describe the scattering field affected by different factors such as permittivity distribution, dimension and buried depth of the inhomogeneities and so on.
基金
国家自然科学基金
关键词
电磁散射
平面分层介质
二维非均匀结构
EM scattering, Stratified medium, 2-D inhomogeneities, Buried objects
