本文選題：電磁散射 + 球矢量波函數(shù)　； 參考：《安徽大學》2017年碩士論文

【摘要】：本文以旋轉(zhuǎn)橢球和有限長圓柱形散射體為例深入研究了通常介質(zhì)和手征媒質(zhì)對典型電磁波束的散射特性,其中所選用的典型電磁波束包括高斯波束、零階貝塞爾波束和電偶極子輻射場。主要工作及科研成果如下:1.詳細介紹了解析法和半解析方法中得到廣泛應(yīng)用的廣義Lorenz-Mie理論(GLMT)和擴展邊界條件法(EBCM),作為驗證本文方法正確性的對照標準。2.把散射場和介質(zhì)散射體內(nèi)部的場用球矢量波函數(shù)展開,然后應(yīng)用電磁場邊界條件并遵循矩量法的一般理論步驟選取適當?shù)臋z驗函數(shù),推導(dǎo)出求解電磁波束散射場展開系數(shù)的線性方程組,進而求出展開系數(shù)和散射場。運用Matlab編程計算旋轉(zhuǎn)橢球和有限長圓柱形介質(zhì)散射體對高斯波束、零階貝塞爾波束和電偶極子輻射場的歸一化微分散射截面等。3.同樣基于各部分場用球矢量波函數(shù)展開和矩量法的一般理論步驟,研究了手征體對典型電磁波束包括高斯波束、零階貝塞爾波束和電偶極子輻射場的散射,并對散射特性進行了簡要討論。
[Abstract]:In this paper, the scattering characteristics of typical electromagnetic beam by ordinary medium and chiral medium are studied by taking rotating ellipsoid and finite cylindrical scattering body as examples. The typical electromagnetic beam selected includes Gao Si beam. Zero order Bezier beam and electric dipole radiation field. The main work and research results are as follows: 1. The generalized Lorenz-Mie theory and extended boundary condition method, which are widely used in analytic and semi-analytical methods, are introduced in detail. The field inside the scattering field and the medium scattering body is expanded with the sphere vector wave function, and then the proper test function is selected by applying the electromagnetic field boundary conditions and following the general theoretical steps of the method of moments. The system of linear equations for solving the expansion coefficient of electromagnetic beam scattering field is derived, and the expansion coefficient and scattering field are obtained. The normalized differential scattering cross sections of Gao Si beam, zero order Bessel beam and electric dipole radiation field are calculated by Matlab programming. Also based on the general theoretical steps of the spherical vector wave function expansion and the method of moments, the scattering of typical electromagnetic beams including Gao Si beam, zero order Bezier beam and electric dipole radiation field by chiral bodies is studied. The scattering characteristics are briefly discussed.
【學位授予單位】：安徽大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN011

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本文編號：1896093