摘要
基于球矢量波函数的正交完备性,给出了具有任意传播方向两种极化模式的平面波用球矢量波函数展开的形式,导出了其展开系数的具体表达式.研究了单轴各向异性介质球对任意方向入射平面波的散射,利用球矢量波函数及傅里叶变换方法得到了各向异性介质球的内场展开式,结合切向连续边界条件给出了散射系数.数值分析了介电常数张量元、有耗、无耗、尺寸参数、入射角和方位角等对单轴各向异性介质球的雷达散射截面的影响.
Based on orthogonality of spherical vector wave functions(SVWFs), the ex pansion coefficients of a plane wave, with arbitrary directions of propagation and polari zation, for both transverse magnetic and transverse electric modes are obtained in terms of spherical vector wave functions. The scattering of a uniaxial anisotropic sphere illu minated by an arbitrary direction incident plane wave investigated. The internal electro- magnetic fields in the anisotropic are expanded in terms of the SVWFs by introducing the Fourier Transform. By matching the fields on the boundary, the scattering coeffi cients are analytically derived. The effects of permittivity tensor elements, absorption, size parameter, incident angle and azimuth angle on the distribution of radar cross sec- tion are numerically analyzed in detail.
出处
《电波科学学报》
EI
CSCD
北大核心
2014年第4期668-672,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金(编号:61308025
61172031)
央高校基本科研业务费专项资金资助项目
关键词
电磁散射
各向异性介质
球矢量波函数
electromagnetic scattering
anisotropic medium
spherical vector wave functions
作者简介
联系人:李正军E-mail:lizj@xidian.edu.cn 李正军(1985-),男,湖北人,讲师,主要研究方向为小粒子光/电磁散射、辐射力和扭矩的研究.
吴振森(1946-),男,湖北人,西安电子科技大学教授,博士生导师,近年来主要从事复杂介质、非均匀介质中的电磁波/光波的传播与散射、目标激光散射特性和电磁散射等方面的研究.