摘要
采用快速多极子方法计算无限大导体平面上凹槽的雷达散射截面。由电磁场等效原理导出无限大导体平面上凹槽的等效电流和磁流组成的耦合积分方程,用共轭梯度法和电流迭代的方法求解此耦合积分方程,在迭代的过程中用快速多极子方法加快矩阵和向量之间的运算,快速多极子方法的引入使计算量和内存需求都由O(N2)下降到O(N1.5)。给出了算例,计算结果表明本文算法所得的结果与MOM的结果完全相符。
The fast multipole method is applied for calculatin g the radar cross section of a groove in a perfectly conducting plane. The coupl ed integral equations for the induced currents of a groove in a perfect conducti ng plane are obtained in terms of equivalent principle, and solved by using CGM and current iteration method, FMM is employed to speed up the matrix-vector multiplication. After FMM acceleration, both the computin g time and memory needs are reduced from O(N^2) to O(N^(1.5)) withou t increasing the complexity of implementation. Some examples are calculated, the numerical results are in perfect agreement with the MOM result.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2005年第2期42-45,共4页
Journal of National University of Defense Technology
