基于自适应多层复源波束的多目标散射分析方法

Scattering of Multiple Objects Based on Adaptive Multilevel Complex Source Beam Method

提出了一种分析多目标电磁散射问题的新方法。首先采用区域分解的方式进行空间划分,使得每个目标划分在一个子区中;随后在每个子区中使用基于矩量法(Mo M)的多层复源波束方法(MLCSB)进行阻抗矩阵和电流表面矢量的相乘计算,在计算的同时获得子区表面电流的复源波束(CSB)展开;最后,为了利用复源波束的方向性,提出了一种自适应复源波束转移方式,用来进行不同尺寸的子区间直接耦合。数值算例验证了该方法的准确性和处理复杂多目标电磁散射问题的能力。

A novel method for electromagnetic scattering of multiple objects is proposed in this work. The domain decomposition approach is firstly applied for spatial partition, and each object is divided as a separate sub-region. Then in each sub-region, the multilevel complex source beam method（MLCSB） based on the method of moment（Mo M） is applied to accelerate the multiplication of impendence matrix and surface current vector. The complex source beam（CSB） expansions of the surface current for the sub-region can be obtained along with the multiplication. Finally, to fully exploiting the directional property of CSBs, an adaptive translation process based on CSBs is proposed for the coupling between sub-regions with different size. Several numerical results are given to validate the proposed method for multiple objects.