基于时域平面波算法快速求解电大目标瞬态散射特性

Analysis of transient scattering by electrically large objects using plane-wave time-domain algorithm

基于电磁场时域积分方程(TDIE)数值技术计算电大目标的瞬态散射特性,其计算量和内存需求大。应用时域平面波算法(PWTD)加速求解TDIE,针对算法实现中三个关键步骤,聚集、转移和投射,利用出射表和入射表进行改进。该方法一方面显著降低了内存需求,另一方面通过把PWTD算法中的传统投射方式,改为前向贡献式投射方式,大大减少了投射次数,并且更有利于时间点的对齐,因此提高了计算速度和精度。

The high computational complexity and large memory requirements will be encountered when the transient responses from electrically large objects are considered using time domain integral equation （TDIE） numerical technique. Plane wave time domain （PWTD） is employed for reducing the computational scale of TDIE. The outgoing rays table and incoming rays table strategy are adopted for decreasing the memory requirements, and a new forward contribution project method is presented. Numerical results that demonstrate the validity and efficiency of proposed scheme are presented in this paper.