三维电大尺寸复杂群目标的单站RCS的快速多极子分析  

Using the Fast Multipole Method to Analyze Monostatic RCS of Electrically Large 3-D Multi-Conducting Bodies

作　　者：谭云华[1] 周乐柱[1] 

机构地区：[1]北京大学信息科学技术学院电子学系,北京100871

出　　处：《北京大学学报（自然科学版）》2004年第5期823-829,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金 (6 0 0 71 0 1 6 );教育部博士学科点基金 (2 0 0 1 0 0 0 1 0 37)资助项目

摘　　要：用快速多极子算法 (FMM)和共轭梯度法 (CG)求解三维电大尺寸复杂群目标的电磁散射特性。对单站雷达散射截面 (RCS)的预估 ,更采用了物理光学电流近似和相位修正的继承迭代法两项措施进一步加快了求解过程。该方法具有节省内存 ,计算量小 ,迭代速度快且精确度高的特点 ,特别适于准确分析多个电大尺寸目标间的相互影响。A fast algorithm—fast multipole method and conjugate gradient method (FMM CG)is developed to analyze electromagnetic scattering by electrically large three dimensional multi conducting bodies in this paper.Two methods are also presented to accelerates the solution of RCS:surface electric current approximation of physical optics (PO) and phase corrected succession iterative method.This algorithm obviously reduces the computing complexity and memory requirement.It is fast and accurate,just fit for analysis of interactions between electrically large multi conducting bodies.Finally,the accuracy and efficiency of the method are verified by 3 D numerical examples.

关 键 词：电磁散射 快速多极子算法 雷达散射截面(RCS) 

分 类 号：O451[理学—无线电物理]