Electromagnetic scattering response from a uniaxial chiral cylinder by using cylindrical vector wave functions

Based on the concept of characteristic waves and the method of angular spectral expansion, eigenfunction expansion of the electromagnetic waves scattering in uniaxial chiral medium is derived in terms of the vector wave functions. It is revealed that the solution of the source-free vector wave equation for uniaxial chiral medium is composed of two transverse and a longitudinal wave. Numerical results for the electromagnetic scattering characteristics of the scatterer. On examining the frequency-dependence of the backward echo width, it is shown that the uniaxial chiral cylinder can be employed to construct reflection-reduction curved surface in a wide-band frequency.

单轴手征填充圆柱波导的传输特性研究

本文根据圆柱矢量波函数和边界条件 ,推导了单轴手征介质填充圆柱波导的特征方程 ,分析了色散关系和内场。数值研究表明 ,在这种波导中影响电磁特性的主要因素是单轴的手征项。与各向同性手征介质± n阶分裂模明显不同的是 ,单轴手征介质填充圆柱波导中± n阶模式波的传播速度是相等的。

涂覆单轴双各向异性介质圆柱的电磁散射特性

该文分析了无限长均匀双各向异性圆柱的电磁散射特性,基于柱矢量波函数和傅立叶变换法得出单轴双各向异性介质内部的电磁场特性。单轴双各向异性圆柱体位于自由空间中受均匀平面波的垂直入射可极化为TE波和TM波,该文以TM为例,得出各区域用柱矢量波函数表示的解析表达式,应用双各向异性介质与自由空间分界面上电磁场切向连续和在导体柱上切向电场等于零的边界条件,得出单轴双各性异性介质圆柱内的电磁场和散射场的系数所满足的矩阵方程,通过矩阵方程和贝塞尔函数的大宗量渐进展开式导出其雷达散射宽度的表达式,通过fortran编程验证与导出的结果吻合。