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Efficient integral equation solution of electromagnetic scattering by arbitrarily shaped objects in planar, multilayered media.

机译：平面多层介质中任意形状物体电磁散射的有效积分方程解。

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摘要

The solution of electromagnetic scattering by objects located in planar, multilayered media has long been the subject of active research. For layered-media integral equation solutions via the Method of Moments (MoM), the O({dollar}Nsp2{dollar}) matrix fill is often prohibitively expensive, even for problems of moderate size. For spatial-domain formulations, this is due to the presence of the Sommerfeld integrals required for obtaining the Green's functions in spatial form.; These integrals are completely avoided through use of the complex-image method, which represents the spatial-domain Green's functions in closed form. However, this method is not without limitations, most notably a finite region of validity and an undesirable sensitivity to the choice of requisite parameters. This thesis focuses on methods for overcoming these limitations, to allow robust implementation of the method within the framework of an automated, general-purpose analysis program, applicable to the solution of scattering from arbitrarily shaped objects residing in any number of dielectric layers. Evaluations of several possible improvements to the original complex-image method are presented. A new approach is also presented for representing the angular-dependent Green's function terms that are required when both horizontal and vertical electric currents are present.; The complex-image method is applied in this work to the MoM solution of the mixed-potential form of the electric field integral equation (MPIE). Several numerical results are presented for planar and nonplanar objects, including a microstrip patch antenna, wire dipole antennas penetrating dielectric half-spaces, and a microstrip air bridge. These results are compared with measurements or the results from other programs whenever possible.; A brief discussion of scattering parameter extraction is also covered, with a comparison of the Prony and Generalized Pencil-of-Functions (GPOF) methods.
机译：解决位于平面，多层介质中物体的电磁散射问题一直是积极研究的主题。对于通过矩量法（MoM）的分层介质积分方程式解决方案，即使对于中等大小的问题，O（{Nol2} {Nsp2 {Nol2}）矩阵填充也常常过高。对于空间域公式，这是由于存在以空间形式获得格林函数所需的Sommerfeld积分。通过使用复杂图像方法可以完全避免这些积分，该方法以封闭形式表示空间域Green的功能。但是，这种方法并非没有局限性，最显着的是有效性的有限区域和对必需参数选择的不希望的敏感性。本文着重于克服这些局限性的方法，以允许该方法在自动化的通用分析程序框架内的稳健实现，适用于解决来自任意数量介电层中任意形状物体的散射问题。提出了对原始复杂图像方法的几种可能改进的评估。还提出了一种新方法，用于表示水平电流和垂直电流同时存在时所需的与角度相关的格林函数项。在这项工作中，将复杂图像方法应用于电场积分方程（MPIE）的混合势形式的MoM解。提出了一些针对平面和非平面物体的数值结果，包括微带贴片天线，穿透介电半空间的线偶极天线和微带气桥。尽可能将这些结果与测量结果或其他程序的结果进行比较。还介绍了散射参数提取的简短讨论，并比较了Prony和广义铅笔功能（GPOF）方法。

著录项

  • 作者

    Webb, David Bedford.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Engineering Electronics and Electrical.; Physics Electricity and Magnetism.
  • 学位 Ph.D.
  • 年度 1995
  • 页码 110 p.
  • 总页数 110
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;电磁学、电动力学;
  • 关键词

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