任意极化平面波斜入射柱体电磁散射分析  

Analysis of EM Scattering on Arbitrary Polarized Plane-Wave Oblique Irradiate to Cylinder

作　　者：周辉[1] 邢锋[1] 刘起坤[1] 王宇[1] 张魏[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2016年第4期405-409,共5页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(62101056)

摘　　要：根据椭圆极化平面波的极化角与椭圆率角,通过极化分解的方法分析推导出两个正交的电磁场分量,得到两分量的相位差以及复振幅比。在柱坐标系下利用波函数展开分别分析了两个正交分量对圆柱体的散射场分量,最后进行矢量叠加得到总散射场。采用Matlab编程计算了单根圆柱体在不同极化平面波、不同斜入射角度下的散射场,并与基于严格矩量法的仿真软件FEKO结果进行比较。结果表明,随着椭圆率角的增加,斜入射角度的减少,导体圆柱前后向散射场复振幅比值减小,该算法与矩量法计算结果相比吻合良好,并且大大节约了计算内存与计算时间。According to the polarization angle and ellipticity angle of the elliptic polarized planewave, the two orthogonal electromagnetic field components are derived by polarization decomposing, and the phase difference and complex amplitude ratio of the two components are obtained. The wave function expansion in cylindrical coordinate is applied to analyze the scattering field components of the two orthogonal components contributing to cylinder respectively, and the total scattering field can be obtained by overlapping the three vectors. In this way, the scattering fields of a circular cylinder under the cases of different polarized plane-wave and oblique incidence are calculated respectively by software MATLAB. Also the results are compared to those of simulation software FEKO based on the method of moments（MoM）. The results show that the scattering ratio of forward and backward re- duces with the increase of the ellipticity angle and the decrease of the oblique incidence angle. Meanwhile, the results by the proposed algorithm agree well with those of MoM and the computation memory is greatly saved as well as the computation time.

关 键 词：极化分解 任意极化 斜入射 电磁散射 

分 类 号：TN821[电子电信—信息与通信工程] O441[理学—电磁学]