基于电磁多尺度理论的各向异性球体目标散射特性  

Scattering characteristics of anisotropic spherical target based on multi-dimensional theory of electromagnetic field

作　　者：李应乐[1] 李瑾[2] 王明军[1] 董群峰[1] 

机构地区：[1]咸阳师范学院电波传播与散射研究所,陕西咸阳712000 [2]西安电子科技大学理学院,陕西西安710071

出　　处：《兰州理工大学学报》2012年第5期164-167,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(60971079);陕西省自然科学基金(2009JM8020);陕西省教育厅自然科学基金(09JK800)

摘　　要：将无耗各向异性介质重构为电学上的无耗各向同性介质,得到重构目标的散射截面;进而得到主坐标系中无耗各向异性介质球的散射截面,将介质退化到各向同性介质时,各向异性介质球的散射截面与Mie理论完全一致,验证所得结果的正确性.仿真结果表明:散射截面正比于目标介电常数张量的元素且随入射方向的变化而变化,所得结果为复杂形体各向异性介质目标的散射评判提供理论基础.The non-dissipative anisotropic dielectric was reconstructed to get a non-dissipative isotropic medium as defined in electricity and its scattering cross-section was obtained.In primary coordinate system,the scattering cross-section of a non-dissipative anisotropic dielectric sphere was consequently obtained.It was found that when the anisotropic medium was degenerated into an isotropic one,the scattering cross-section of this sphere was in agreement with that derived with Mie theory,so the validity of obtained result was verified.Simulation result showed that the scattering cross-section was proportional to the element of the target dielectric tensor and varies with the incident wave direction.For the scattering of a complex anisotropic medium target,this result would provide a theoretical basis for its evaluation.

关 键 词：各向异性 电磁场多尺度理论 散射 重构 

分 类 号：O436[机械工程—光学工程]