计算粗糙地面下方埋藏目标复合散射的E-PILE+BMIA/CAG算法

doi:10.3969/j.issn.1001-506X.2013.03.04

Journal of Systems Engineering and Electronics ›› 2013, Vol. 35 ›› Issue (3): 474-480.doi: 10.3969/j.issn.1001-506X.2013.03.04

计算粗糙地面下方埋藏目标复合散射的E-PILE+BMIA/CAG算法

姬伟杰¹，童创明^1,2

1. 空军工程大学防空反导学院，陕西三原 713800； 
2. 毫米波国家重点实验室，江苏南京 210096

出版日期:2013-03-20 发布日期:2010-01-03

E-PILE+BMIA/CAG method for calculating electromagnetic scattering from buried objects below rough surface

JI Wei-jie¹， TONG Chuang-ming^1,2

1. Institute of Air Defense and Antimissile, Air Force Engineering University, Sanyuan 713800, China；2. State Key Laboratory of Millimeter Waves， Nanjing 210096, China

Online:2013-03-20 Published:2010-01-03

摘要/Abstract

摘要：

为快速获取电大尺寸随机粗糙面下方埋藏目标的电磁散射特性，基于层内波传播展开法（propagation-inside-layer-expansion, PILE）和带状矩阵迭代及规范网格法（banded matrix iterative approach canonical grid，BMIA/CAG），提出了结合带状矩阵迭代及规范网格法的扩展层内波传播展开法（E-PILE+BMIA/CAG）。数值计算过程中，以高斯随机粗糙面模拟实际地表面，并引入锥形入射波以减小人为截断粗糙面所引起的计算误差。为验证算法的有效性和收敛性，计算了一维介质粗糙面下方埋藏无限长二维介质圆柱目标的散射特性，研究了目标与粗糙面之间的相互作用，并与已有算法结果进行比较。最后计算了大入射角情况时地面下方埋藏目标的复合散射特性。该研究成果对于目标探测等领域具有一定的理论指导价值。

Abstract:

In order to calculate quickly the composite electromagnetic scattering from buried objects below a large dimensional rough surface, the E-PILE+BMIA/CAG method is presented by combining the extended propagation-inside-layer expansion (PILE) and banded matrix iterative approach canonical grid (BMIA/CAG). The actual ground surface is simulated by a random surface with Gauss spectrum, and the tapered incident wave is chosen to reduce the truncation error. The composite scattering from an infinite length 2-D cylinder buried under the 1-D randomly rough surface with lossy media is calculated by using E-PILE+BMIA/CAG. The validity and convergence of this method are verified by comparing the result with that of the existing method. The coupling effect between the surface and the object and the roughness is studied. Finally, the scattering pattern of buried targets below a rough surface is studied. The numerical results provide a guide in the application of the ground penetrating radar.

姬伟杰，童创明. 计算粗糙地面下方埋藏目标复合散射的E-PILE+BMIA/CAG算法[J]. Journal of Systems Engineering and Electronics, 2013, 35(3): 474-480.

JI Wei-jie， TONG Chuang-ming. E-PILE+BMIA/CAG method for calculating electromagnetic scattering from buried objects below rough surface[J]. Journal of Systems Engineering and Electronics, 2013, 35(3): 474-480.

计算粗糙地面下方埋藏目标复合散射的E-PILE+BMIA/CAG算法

E-PILE+BMIA/CAG method for calculating electromagnetic scattering from buried objects below rough surface

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