A Domain Decomposition Method for Electromagnetic Radiation and Scattering Analysis of Multi-Target Problems
A Domain Decomposition Method for Electromagnetic Radiation and Scattering Analysis of Multi-Target Problems
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DOI：
10.1109/tap.2008.926774
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发表时间：
2008-08
影响因子：
5.7
通讯作者：
K. Zhao;V. Rawat;Jin-Fa Lee
中科院分区：
文献类型：
--
作者：
K. Zhao;V. Rawat;Jin-Fa Lee
提出了一种域分解方法来分析涉及多个可分离散射体的电磁问题。该方法首先将原始问题分解为几个不相交的子区域。在每个子区域中，通过将区域分解为更小的、可能重复的子域来进一步应用域分解方法。域分解方法对于任意几何形状来说足够通用，但也能够利用重复。这使得几何复杂和电气大的子区域问题变得易于处理。子区域通过近场格林函数进行通信。为了克服在电大子区域之间交换信息所需的大量计算成本，采用自适应交叉逼近算法来加快该过程。该方法应用于研究存在频率选择表面的反射器天线系统和天线阵列的辐射特性，以证明本方法的实用性。
A domain decomposition method is presented for analyzing electromagnetic problems involving multiple separable scatterers. The method first decomposes the original problem into several disjoint subregions. In each subregion, the domain decomposition method is further applied by decomposing the region into smaller, possibly repeated, subdomains. The domain decomposition method is general enough for arbitrary geometries, but is also capable of exploiting repetitions. This renders geometrically complicated and electrically large subregion problems tractable. The subregions communicate through the near-field Green's function. To overcome the vast computational costs required in exchanging information between electrically large subregions, the adaptive cross approximation algorithm is adopted to expedite the process. The method is applied to study radiation characteristics of a reflector antenna system and an antenna array in the presence of a frequency selective surface to demonstrate the utility of the present approach.