Scattering from axisymmetric dielectrics or perfect conductors imbedded in an axisymmetric dielectric
Scattering from axisymmetric dielectrics or perfect conductors imbedded in an axisymmetric dielectric
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来自轴对称电介质或嵌入轴对称电介质中的完美导体的散射
DOI：
10.1109/tap.1977.1141642
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发表时间：
1977
影响因子：
5.7
通讯作者：
T. Seliga
中科院分区：
文献类型：
--
作者：
V. Bringi;T. Seliga
Peterson 和 Strom 将来自单个均匀散射体的经典电磁散射的 Waterman 的 T 矩阵公式扩展为包括来自多层散射体的散射。 T 矩阵是指矢量亥姆霍兹方程的球面波解的展开式。发展了计算轴对称散射体后向散射截面的理论和计算方法。这种方法使用等价原理，比 Peterson 和 Strom 依赖于概念上类似的庞加莱-惠更斯原理的方法对 T 矩阵公式产生了更简洁和系统的发展。该方法实际上适用于尺寸高达 ka \sim 2\pi 的散射体以及较宽的介电常数范围。将示例计算与不同尺寸同心壳散射的扩展米氏理论计算以及从嵌入有损耗的球形电介质中的移位球形完美导体获得的测量反向散射横截面进行比较。
Waterman's T -matrix formulation of classical electromagnetic scattering from a single, homogeneous scatterer has been extended by Peterson and Strom to include scattering from multilayered scatterers. The T -matrix refers to expansions in spherical wave solutions of the vector Helmholtz equation. This theory and the computational method for calculating backscattering cross sections for axisymmetric scatterers are developed. This approach, using the equivalence principle, yields a more concise and systematic development to the T -matrix formulation than that of Peterson and Strom which relies upon the conceptually similar Poincare-Huygens principle. The method is realistically applicable to scatterers of sizes up to ka \sim 2\pi and for a wide range of dielectric constants. Sample computations are compared with extended Mie theory calculations of scattering by concentric shells of varying size and with measured backscattering cross section obtained from a displaced spherical perfect conductor imbedded in a lossy, spherical dielectric.