摘要
本文提出一种新的边界条件。这种边界条件在边界处强加理想导体对计算场区进行截断 ,而将由此产生的反射场分离去除 ,从而减小反射所产生的干扰。与 PML边界条件相比 ,由于它不需要吸收层 ,不需要 PML层中人为的场量分解 ,因此节约了内存 ,提高了计算速度。文中给出一维、二维空间的计算实例 。
A new technique of free space simulation is developed for solving unbounded electromagnetic problems with the finite difference time domain method. Similar to PML (Perfectly Matched Layer), electric walls are placed on the boundary for the truncation of FDTD lattices.Using this technique absorbing layer for the electromagnetic waves is not needed, the reflection on the boundary is removed from the scattering incident wave. The numerical results of FDTD for the comparison between this method and PML are also given in this paper. It is shown that this solver reduces computational complexities, memory requirements, and is feasible also.
出处
《微波学报》
CSCD
北大核心
2001年第1期32-34,39,共4页
Journal of Microwaves
