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Hybrid integral equation approach for electromagnetic scattering using mixed mesh elements.

机译:使用混合网格元素进行电磁散射的混合积分方程方法。

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摘要

The hybrid volume and surface integral equation approach is applied to solve electromagnetic scattering and radiation problems involving conducting and/or dielectric objects. To flexibly and accurately model the complex structures and maintain the minimum number of unknowns, mixed mesh scheme is proposed to discretize the object. Zeroth-order divergence-conforming basis functions on triangle, quadrangle, tetrahedron, hexahedron, prism and pyramid are used to model the induced current on the object.; Because of the large amount of the memory and CPU time requirement of traditional Method of Moments (MoM), which is proportional to O(N 2), Multilevel Fast Multipole Algorithm (MLFMA) is applied to reduce the operation and memory requirement to O(N log N) when solving the impedance matrix equation resulted from the integral equations by an iteration solver.; To further reduce the number of unknowns, increase the accuracy and convergence rate, higher-order divergence-conforming basis functions over the above mesh elements are introduced to model the induced current on the object.; By combination of mixed-mesh scheme, MLFMA, and higher-order basis functions, it is practical to simulate complex, large-scale EM problems.
机译:体积和表面积分方程的混合方法用于解决涉及导电和/或介电物体的电磁散射和辐射问题。为了灵活,准确地对复杂结构建模并保持最少的未知数,提出了混合网格方案来离散化对象。三角形,四边形,四面体,六面体,棱镜和金字塔上的零阶发散一致性基函数用于对物体上的感应电流进行建模。由于传统的矩量法(MoM)与O(N 2)成比例,因此需要大量的内存和CPU时间,因此应用多级快速多极算法(MLFMA)来减少对O(N 2)的运算和内存需求。当通过迭代求解器求解由积分方程产生的阻抗矩阵方程时;为了进一步减少未知数,提高准确度和收敛速度,引入了上述网格元素的高阶发散一致性基函数来对物体上的感应电流进行建模。通过混合网格方案,MLFMA和高阶基函数的组合,模拟复杂的大规模EM问题非常实用。

著录项

  • 作者

    Zeng, Zhiyong.;

  • 作者单位

    University of Kentucky.;

  • 授予单位 University of Kentucky.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 140 p.
  • 总页数 140
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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