一维微粗糙面与其上方金属平板的复合电磁散射研究

研究了一维导体随机粗糙面与其上方金属平板的复合电磁散射。应用互易性原理使求解复合目标的二次散射场简化为求解包含平板上的极化电流和微粗糙面散射场的积分方程。利用物理光学近似和粗糙面微扰法分别计算了平板上的感应电流和粗糙面的电磁散射场，导出了复合散射模型单、双站散射的计算公式并给出了单站数值计算结果，讨论了后向复合散射截面随入射频率及平板尺寸、位置的变化关系。

Electromagnetic scattering interaction between a conducting plate and 1D slightly rough surface

The electromagnetic scattering interaction between a perfect conducting plate and one-dimensional (1D) conducting slightly rough surface is investigated in this paper. By employing the reciprocity theorem, the secondary scattered fields from the composite target can be simplified as the evaluation of integral equation involving polarization currents of the conducting plate and scattered fields from the slightly rough surface. The induced polarization current on the conducting plate and the scattering fields from the slight rough surface are evaluated by using Physic Optics (PO) method and the Small Perturbation Method (SPM), respectively. The formulae for the monostatic and bistatic scattering of the composite model is derived and the numerical results are presented, and the dependence of the backscattering cross section of the composite model on the incident frequency and size, position of the plate is discussed in detail.