一种自适应的射线传播多层快速多极子方法

在多层快速多极子方法中,外向波向内向波的转移计算是主要的计算量.传统的转移过程需要计算众多的角谱分量,造成较多计算时间和内存的耗费.一种自适应射线传播多层快速多极子方法可用以降低转移过程计算量.数值计算结果表明,这种算法能够保持合理精度的同时大大减少计算量,适于三维电大尺寸目标RCS的快速求解.

An adaptive ray-propagation multilevel fast multipole algorithm

In MLFMA, the computation on the translation from the outgoing waves to the incoming waves costs the most CPU time. The traditional method need compute many directions, which requires a lot of time and memory. An adaptive ray-propagation method based on MLFMA is proposed in this paper in order to reduce the computational cost in translation process. Numerical results demonstrate that this algorithm can reduce the computational cost greatly while a relatively reasonable accuracy is kept on. The present method is very suitable for solving electromagnetic scattering from 3-D electrically large object.