| 无限大导体平面上凹槽散射的快速多极子分析 |
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| 引用本文： | 徐利军,林宝勤,袁乃昌. 无限大导体平面上凹槽散射的快速多极子分析[J]. 国防科技大学学报, 2005, 27(2): 42-45 |
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| 作者姓名： | 徐利军 林宝勤 袁乃昌 |
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| 作者单位： | 国防科技大学,电子科学与工程学院,湖南,长沙,410073;国防科技大学,电子科学与工程学院,湖南,长沙,410073;国防科技大学,电子科学与工程学院,湖南,长沙,410073 |
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| 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。
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| 关 键 词： | 快速多极子 凹槽 雷达散射截面 |
| 文章编号： | 1001-2486(2005)02-0042-05 |
| 收稿时间： | 2004-10-11 |
| 修稿时间： | 2004-10-11 |
The Fast Multipole Method for Electromagnetic Scattering of a Groove in a Perfectly Conducting Plane |
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| XU Lijun,LIN Baoqin and YUAN Naichang. The Fast Multipole Method for Electromagnetic Scattering of a Groove in a Perfectly Conducting Plane[J]. Journal of National University of Defense Technology, 2005, 27(2): 42-45 |
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| Authors: | XU Lijun LIN Baoqin YUAN Naichang |
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| Affiliation: | College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | The fast multipole method is applied for calculating the radar cross section of a groove in a perfectly conducting plane. The coupled integral equations for the induced currents of a groove in a perfect conducting 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 computing time and memory needs are reduced from O(N2) to O(N1.5) without increasing the complexity of implementation. Some examples are calculated, the numerical results are in perfect agreement with the MOM result. |
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