中文摘要：

在复合目标电磁散射计算中，目标与粗糙面间的耦合近场计算问题是制约算法的主要瓶颈。该文提出一种适用于二维随机粗糙面上电磁散射场计算的迭代积分方程法（IEM）。与传统IEM法不同，迭代IEM法基于近场格林函数建立，考虑了粗糙面面元间的多次电磁互耦作用，散射场不能简化为积分形式的近似解。数值实验表明，与传统MoM法相比，迭代IEM法的内存需求节省了9倍，计算速度比矩量法（MoM）法提升了4．5倍以上，更能有效地计算粗糙面上的散射场。

英文摘要：

In the algorithm of electromagnetic scattering of compound goals, calculating near field coupling between goals and rough surface is the main bottleneck. This paper proposes an efficient iterative integral equation method （IEM） for solving the scattering problems from the two dimensional （2D） rough surface with various roughness. Different from the traditional IEM, the proposed approach, based on the near field green function, takes the multiple coupling into account. Therefore, the scatting field can not be simplified as the integral form as the analytical solution any more. Compared with the moment method （MoM）, the proposed iterative IEM can save much memory requirement and the calculation speed is much faster.