A Memory-Saving Realization of the Perfectly Matched Layer in the Precise-Integration Time-Domain Method
A Memory-Saving Realization of the Perfectly Matched Layer in the Precise-Integration Time-Domain Method
复制标题
精确积分时域法中完美匹配层的节省内存实现
DOI：
10.1109/lawp.2018.2792685
复制
发表时间：
2018-03-01
影响因子：
4.2
通讯作者：
Wang, Jiawei
中科院分区：
文献类型：
--
作者：
Shao, Jinghui;Ma, Xikui;Wang, Jiawei
时域精细积分（PITD）方法采用传统的完全匹配层（PML）方法，将PML区域和主区域的场分量合并到一个场分量矢量中，从而大大增加了存储量。在这封信中，区域分裂（RS）技术，为节省内存实现的PML的PITD方法，提出。在RS技术中，分别计算主区域和每个PML区域中的场分量。通过将连接场分量的采样时间提前半步，保证了任意两个区域间互信息的准确传输。数值实验验证了该方法的有效性和效率。
The memory demand of the precise-integration time-domain (PITD) method is enlarged quite a lot by the implementation of the perfectly matched layers following the conventional way, which is enclosing the field components of the perfectly matched layer (PML) regions and the main region into one field component vector. In this letter, a region-splitting (RS) technique, for the memory-saving realization of the PML in the PITD method, is proposed. In the RS technique, the field components in the main region and each PML region are calculated separately. The accurate mutual information transmissions between any two regions are guaranteed by advancing the sampling time points of the connecting field components by half-time-step. Several numerical experiments are performed to verify the effectiveness and the efficiency of the proposed technique.