平面分層媒質(zhì)中二維非均勻結(jié)構(gòu)電磁散射的研究
A STUDY ON DIRECT EM SCATTERING OF 2-DIMENSIONAL INHOMOGENEITIES BURIED IN A LOOSY STRATIFIED MEDIUM
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摘要: 本文研究埋藏在平面分層媒質(zhì)中的二維非均勻結(jié)構(gòu)的電磁散射分析方法和散射特性。在推導(dǎo)平面分層介質(zhì)中電流絲輻射的Green函數(shù)的基礎(chǔ)上,建立非均勻結(jié)構(gòu)相對于分層媒質(zhì)的等效電流所產(chǎn)生散射場的電場積分方程,進(jìn)而在離散的條件下求解。利用文中提出的方法,對于不同介質(zhì)目標(biāo)的散射進(jìn)行了計算,并比較了埋藏深度、周圍介質(zhì)、分層結(jié)構(gòu)等因素對埋藏目標(biāo)散射特性的影響。Abstract: 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.
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楊棄疾.電磁場理論(上冊).北京,高等教育出版社,1992年,第三章.[2]Wait J R. Electromagnetic Waves in Stratified Media, Oxford: Pergamon Preas, 1970, Ch.2.[3]Chiu C-C, Kiang Y-W, Inverse scattering of a buried conducting cylinder. Inverse Problems, 1991 7(1): 187-202.[4]魯述,徐鵬根.電磁場邊值問題解析方法.武漢:武漢大學(xué)出版社,1992,第二章. -
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