基于FIP WA的RCS快速计算

Fast RCS Computation Based on FIP WA

为改善基于矩量法(MOM)快速多极子(FMM)的稳定性,介绍了快速非均匀平面波算法(FIP WA)。根据入射波及电场积分方程(EFIE),采用修正最陡下降路径(MSDP)进行数值积分和内插外推转换,建立了二维FIP WA模型。该法基于格林函数谱域积分,其转移因子不含特殊函数而仅有初等函数,便于数值实现和稳定性控制,其多层形式复杂度与多层快速多极子(MLFMA)相当。算例表明:该算法与MOM吻合较好,且大幅节省计算时间及计算机内存。

The fast inhomogeneous plane wave algorithm(FIP WA) was introduced to improve the stability of the fast multipole method(FMM) based on the method of moments(MOM) in this paper.The 2-D FIPWA model was established using the modified descent path(MSDP) for numerical integration and transfer of interpolation and extrapolation according to incident wave and electric field integration equation.The algorithm was based on the plane wave expansion of the Green s function,and the diagonal translator had no special fu...