Frezza Fabrizio, Pajewski Lara, Ponti Cristina, Schettini Giuseppe
J Opt Soc Am A Opt Image Sci Vis. 2013 Aug 1;30(8):1632-9. doi: 10.1364/JOSAA.30.001632.
A spectral-domain analysis is presented for the scattering by perfectly conducting cylindrical objects behind a dielectric wall. The solution is developed with an analytical-numerical technique, based on the cylindrical wave approach. Suitable cylindrical functions and their spectral representations are introduced as basis functions for the scattered fields, to deal with their interaction with the planar interfaces bounding the wall. The numerical solution is given in TE and TM polarizations states, and in both near- and far-field zones. The model yields an accurate computation of direct scattering that can be useful for through-wall-imaging applications. A stack of three different dielectric media is considered in the theoretical model. In the numerical results, the upper medium, where the incident field is generated, is assumed to be filled by air, the central layer represents the wall, and the lower medium, which contains the scatterers, is air filled, too. Also general problems of scattering by buried objects can be simulated, being the cylinders buried in a medium of arbitrary permittivity, placed below a dielectric layer.
本文提出了一种用于分析电介质壁后理想导电圆柱物体散射的谱域分析方法。该解决方案是基于圆柱波方法，采用解析 - 数值技术开发的。引入合适的圆柱函数及其谱表示作为散射场的基函数，以处理它们与界定壁的平面界面的相互作用。数值解给出了TE和TM极化状态，以及近场和远场区域的情况。该模型能够精确计算直接散射，这对于穿墙成像应用可能是有用的。理论模型中考虑了由三种不同电介质组成的堆叠结构。在数值结果中，假设产生入射场的上层介质为空气，中间层代表壁，包含散射体的下层介质也为空气。此外，还可以模拟埋入物体散射的一般问题，即圆柱埋在任意介电常数的介质中，并置于电介质层下方。
