A Hybrid Analytic-Numerical Algorithm of Scattering From an Object Above a Rough Surface
A Hybrid Analytic-Numerical Algorithm of Scattering From an Object Above a Rough Surface
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DOI：
10.1109/tgrs.2007.892609
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发表时间：
2007-04
影响因子：
8.2
通讯作者：
Hongxia Ye;Yaqiu Jin
中科院分区：
文献类型：
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作者：
Hongxia Ye;Yaqiu Jin
开发了一种结合解析基尔霍夫近似 (KA) 和矩量数值方法 (MoM) 的混合算法，用于求解 TE 偏振平面波入射下随机粗糙 PEC 表面上方完美导电 (PEC) 物体散射的耦合电场积分方程 (EFIE)。使用共轭梯度方法的 MoM 首先求解对象的 EFIE。采用KA方法解析表达粗糙表面的表面场，大大减少了这些场的大量内存和计算量。然后利用在物体和粗糙表面上引起的表面场的迭代方法来考虑物体和下面的粗糙表面之间的相互作用。该混合算法的收敛性经过数值验证。利用蒙特卡罗实现，这种混合 KA-MoM 算法可以很好地模拟来自 PEC 粗糙表面上方的二维 PEC 圆柱形物体的双基地散射
A hybrid algorithm, combining analytic Kirchhoff approximation (KA) and numerical method of moments (MoMs), is developed to solve the coupling electric-field integral equations (EFIEs) of scattering from a perfect electric conducting (PEC) object above a randomly rough PEC surface under TE-polarized plane-wave incidence. The MoM with the conjugate gradient approach is used to first solve the EFIE of the object. The surface fields on the rough surface are analytically expressed using the KA method, and large memory and computations for those fields are greatly reduced. An iterative approach of the surface fields induced on both object and rough surface is then utilized to take into account interactions between the object and underlying rough surface. Convergence of this hybrid algorithm is numerically validated. Making use of Monte Carlo realization, bistatic scattering from a 2-D PEC cylindrical object above a PEC rough surface is well simulated by this hybrid KA-MoM algorithm