双球散射和均匀球对相干双波束的散射  

Electromagnetic scattering by bi-sphere groups and coherent-beam scattering by homogeneous spheres

作　　者：刘临生[1] 柯亨玉[1] 吴振森[2] 白璐[2] 

机构地区：[1]武汉大学电子信息学院 [2]西安电子科技大学理学院,陕西西安710071

出　　处：《电波科学学报》2007年第1期83-90,共8页Chinese Journal of Radio Science

基　　金：国家高技术研究发展计划(2004AA604080);国家自然科学基金(60371020;40406020)资助项目

摘　　要：利用米(Mie)理论,以及介质分界面处的边界条件和一些特殊函数的变换关系,求解了两个球形介质小粒子对于平面波的散射问题,和单个均匀介质小球对于波束中心通过球心的两相干高斯波束的散射问题。二者均得到了严格的解析解,并整理出易于编程计算的形式。对散射系数的求解,前者采用了待定系数法,后者采用了几何变换法,均降低了计算的复杂程度。By using Miens theory, the boundary conditions, and transformation of special functions, the scattering of hi-sphere groups illuminating by plane-wave and one sphere by cores-traversed coherent Gauss-beams is sdved, respectively. The analytical expressions of scattering fields were deduced so that the available forms for programming were obtained. For the solution of scattering coefficient, the undetermined method is used for the former and the plane geometry method is adopted for the later, and the complexity of the calculation is effectively decreased.

关 键 词：电磁散射 待定系数法 双球散射 波束散射 散射截面 

分 类 号：TN011[电子电信—物理电子学]