A Multitrace Surface Integral Equation Method for PEC/Dielectric Composite Objects
A Multitrace Surface Integral Equation Method for PEC/Dielectric Composite Objects
复制标题
PEC/介电复合物体的多道曲面积分方程方法
DOI：
10.1109/lawp.2021.3082536
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发表时间：
2021-08
影响因子：
4.2
通讯作者：
赵冉
中科院分区：
文献类型：
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作者：
赵冉
多道区域分解表面积分方程（MT-DD-SIE）最初开发的分析电磁散射从介质复合目标的扩展，以有效地考虑完美的导电（PEC）机构。这是通过对PEC表面采用罗宾传输条件（RTC）来实现的。这些PEC-RTC是PEC体的唯一控制方程，用于将其“耦合”到介电体。在离散化时，PEC-RTC产生良好条件的矩阵块，因此，不会对MT-DD-SIE矩阵方程的迭代解的收敛产生负面影响。所得到的方法是显着更快，具有更小的内存占用比传统的全球耦合接触区域建模方法，使用耦合电场和Poggio-Miller-Chang-Harrington-Wu-Tsai SIEs在分析复合PEC/电介质对象的电磁散射。这是证明了数值例子涉及电大散射体。
The multitrace domain decomposition surface integral equation (MT-DD-SIE) originally developed to analyze electromagnetic scattering from dielectric composite objects is extended to efficiently account for perfect electrically conducting (PEC) bodies. This is achieved by adopting Robin transmission conditions (RTCs) to PEC surfaces. These PEC-RTCs, which are the only governing equations for a PEC body, are used to “couple” it to the dielectric bodies. Upon discretization, PEC-RTCs produce a well-conditioned matrix block and, therefore, does not negatively affect the convergence of the iterative solution of the MT-DD-SIE matrix equation. The resulting method is significantly faster and has a smaller memory footprint than the traditional globally coupled contact-region-modeling method that uses the coupled electric field and Poggio–Miller–Chang–Harrington–Wu–Tsai SIEs in analyzing electromagnetic scattering from composite PEC/dielectric objects. This is demonstrated by numerical examples involving electrically large scatterers.