二维导体目标瞬态散射分析的混合快速算法

Fast hybrid algorithm for the analysis of transient scattering by 2-D conducting cylinders

将时域积分方程法(TDIE)和时域物理光学法(TDPO)相结合,分析横电(TE)波入射情形下二维导体复合目标的瞬态散射特性.推导出了基于电场积分方程的显式时间步进方程.该方法将电大尺寸且表面结构平滑的目标用TDPO法求解,将电小尺寸且表面结构精细的目标用TDIE法求解.为考虑目标之间的耦合,对TDIE与TDPO进行混合迭代.数值算例中,计算了目标表面的电流响应.计算结果表明,与纯TDIE法相比,在精度相近的情况下,该混合法计算效率大大提高.

Transverse Electric（TE） transient scattering by two-dimensional combinative conducting cylinders is investigated by the combination of the time domain integral equation （TDIE） method and the time domain physical optics （TDPO） method. Based on the electric field integral equation （EFIE）, the explicit solution of Marching-On-in-Time （MOT） is developed. In this method, the TDPO is applied to the electrically large but smooth cylinder while the TDIE is applied to the electrically small but complicated one. To take account of the interactions between combinative cylinders, the mixed iteration of TDIE/TDPO is introduced. In numerical examples, the induced currents on the surface of conducting cylinders are presented. Numerical results show that in the case of similar accuracy, this hybrid method improves computational efficiency greatly.