介质涂敷电大尺寸导体柱电磁散射特性的有限元-快速多极混合算法分析

Hybrid Finite Element Method and Fast Multipole Algorithm for the Analysis of Scattering from Large Coated Cylinders

采用有限元 -快速多极混合算法分析了介质涂层电大尺寸导体柱的电磁散射特性。与有限元 -矩量法相比 ,快速多极算法将计算复杂度从 O(N2 )降低到 O(N1 .5 ) ,大大加快计算速度 ,减少存储量。计算表明该混合算法对电大复杂涂敷目标电磁特性的分析是灵活而有效的。

A combination of finite element method (FEM) an d fast multipole algorithm (FMA) is proposed to analyze the scattering problem o f electrically large coated cylinders. Comparing with the conventional FEM-MoM, the computational complexity of FEM-FMA decreases from O(N 2) to O(N 1.5 ) . The accuracy and the advantage of the method in CPU time consumption a nd memory requirement are verified by numerical examples.