结合P-FFT算法和特征基函数分析大型阵列散射

特征基函数方法利用特征值分解提取目标散射特征,构造基于特征向量的基函数可以高效的缩减矩量法分析所需的未知量数目,有利于分析有限周期阵列电磁散射或辐射问题。然而,对于电大尺寸电磁阵列散射问题,直接求解由特征基函数组成的矩阵方程,仍然面临着计算量较大等问题,难以适用于单机计算。本文结合特征基函数和预修正傅里叶快速算法求解体面结合积分方程,分析了大型金属介质混合有限周期阵列的散射特性,该算法有效减少了计算量和计算时间,并且改善了迭代求解收敛性能。

Combined P-FFT and CBFM Algorithm for Large-Scale Array Scattering Problems

Scattering characteristics of objects can be retrieved by characteristic basis function method(CBFM),then,new series of basis functions are built based on the eigenvectors,which can be applied to reduce the unknowns needed for MoM method.The method is appropriate for the analysis of finite periodic array problems.While,to consider electric ultra-large problems,it is still an incredible requirement of memory and CPU time to solve the matrix equations based on characteristic basis functions(CBFs),which is dif...