| 基于FGMRES-PBTG算法的介质粗糙面散射特性的模拟 |
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| 引用本文： | 闫沛文,童创明.基于FGMRES-PBTG算法的介质粗糙面散射特性的模拟[J].电波科学学报,2009,24(1). |
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| 作者姓名： | 闫沛文 童创明 |
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| 作者单位： | 1. 空军工程大学导弹学院,陕西,三原,713800
2. 空军工程大学导弹学院,陕西,三原,713800;东南大学毫米波国家重点实验室,江苏,南京,210096 |
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| 基金项目： | 陕西省自然科学基金，东南大学毫米波国家重点实验室基金 |
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| 摘 要： | 针对具有大介电常数介质粗糙面的电磁散射问题,提出了灵活的广义最小余量法(FGMRES)和基于物理意义的双网格法(PBTG)的混合算法,并对介质粗糙面的电磁散射系数和发射率进行了仿真.在PBTG算法的基础上,应用了FGMRES迭代算法求解矩阵方程.通过PBTG算法加速矩阵向量积和FGMRES算法加快迭代收敛速度,达到减少计算量和加快计算速度的目的.通过计算实例可知,FGMRES相对其他迭代法具有很好的收敛性,耗时较少,在满足精度要求的前提下,较其他迭代法明显加快了计算速度,并有效地模拟了介质粗糙面的电磁散射特性.
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| 关 键 词： | 介质粗糙面 散射系数 发射率 基于物理意义的双网格法 灵活的广义最小余量法 |
Simulations of scattering characteristic of lossy dielectric surfaces based on FGMRES-PBTG method |
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| YAN Pei-wen,TONG Chuang-ming.Simulations of scattering characteristic of lossy dielectric surfaces based on FGMRES-PBTG method[J].Chinese Journal of Radio Science,2009,24(1). |
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| Authors: | YAN Pei-wen TONG Chuang-ming |
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| Affiliation: | 1.Institute of Missile;Air Force Engineering University;Sanyuan Shaanxi 713800;China;2.State key Laboratory of Millimeter waves;Southeast University;Nanjing Jiangsu 210096;China |
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| Abstract: | To simulate bistatic electromagnetic scattering coefficient and emissivities of dielectric rough surface with a large dielectric constant,the Flexible Generalized Minimal Residual Method and the Physics-Based Two-Grid Method(FGMRES-PBTG) is applied.The method is that the FGMRES is adopted to compute matrix equations based on the PBTG.The matrix-vector multiplication and the speed of the iterative convergence were improved by the FGMRES and the PBTG,respectively.By the examples,it is of good astringency and ... |
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| Keywords: | dielectric rough surface scattering coefficient emissivity PBTG FGMRES |
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