Fast Solving Scattering From Multiple Bodies of Revolution With Arbitrarily Metallic-Dielectric Combinations
Fast Solving Scattering From Multiple Bodies of Revolution With Arbitrarily Metallic-Dielectric Combinations
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DOI：
10.1109/tap.2019.2911405
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发表时间：
2019-04
影响因子：
5.7
通讯作者：
M. Jiang;Yu-ke Li;Zhi Rong;L. Lei;Yongpin P. Chen;Jun Hu
中科院分区：
文献类型：
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作者：
M. Jiang;Yu-ke Li;Zhi Rong;L. Lei;Yongpin P. Chen;Jun Hu
多旋转体的精确仿真在许多工程应用领域具有重要意义。单旋转体（BOR）的优点在于可以将三维问题简化为一系列解耦的二维问题，从而不消耗大量的计算内存和时间。然而，对于多个任意方向旋转体的旋转散射问题，模态格林函数（MGF）不起作用。本文提出了一种基于域分解框架MBoRs （DDM-MBoRs）的金属介质介质MBoRs的电磁散射问题求解方法。首先，采用快速非均匀平面波算法（FIPWA）有效地求解了每个单波内的感应电流或感应磁流；然后BoRs通过远场格林函数相互耦合。特别地，利用改进的基函数映射技术（BFMT）将BoR基函数映射到常向量基函数，从而使多级快速多极算法（MLFMA）能够灵活地加速各BoR的相互耦合。在该框架下，具有任意金属-介电组合的mbr可以有效地求解。数值结果表明了该方法的准确性和有效性。
The accurate simulation of multiple bodies of revolution (MBoRs) is of great importance in many areas of engineering applications. The beauty of a single body of revolution (BOR) is that the 3-D problem can be reduced to a series of decoupled 2-D problems thereby not consuming large computational memory and time. However, for a multiple arbitrarily orientated bodies of revolution scattering problem, the modal Green’s function (MGF) does not work. In this paper, an approach based on domain decomposition framework MBoRs (DDM-MBoRs) is proposed to solve electromagnetic scattering from MBoRs involving metallic and dielectric objects. First of all, the induced electric or magnetic currents in each single BoR are efficiently solved by a fast inhomogeneous plane wave algorithm (FIPWA). Then BoRs couple with each other via the far-field Green’s function. In particular, a modified basis function mapping technique (BFMT) is utilized to project the BoR basis functions to constant vector basis functions, which further makes it flexible to employ multilevel fast multipole algorithm (MLFMA) to accelerate the mutual coupling of each BoR. In the proposed framework, MBoRs with arbitrarily metallic-dielectric combinations can be efficiently solved. Several numerical results are illustrated to demonstrate the accuracy and efficiency of the proposed method.