全局稳定性一致的共形卷积完全匹配层  

Conformal convolutional perfectly matched layer with uniform stability

作　　者：王玥[1] 王建国[1,2] 张殿辉[1] 陈再高[1] 蔡利兵[1] 乔海亮[1] 

机构地区：[1]西北核技术研究所,西安710024 [2]西安交通大学电信学院,西安710049

出　　处：《强激光与粒子束》2013年第2期441-445,共5页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：在正交网格体系中建立物理模型共形描述的基础上,针对采用扩展元胞技术的共形时域有限差分(ECT-CFDTD)方法模拟计算波导器件遇到的开放端口截断问题,给出了积分形式的共形卷积完全匹配层方法,算法具有与ECT-CFDTD相同的数值稳定性。设置不同的完全匹配层的控制参数,对波导中有消逝波存在的情况进行长时间模拟计算,分析共形卷积完全匹配层对消逝波的长效截断能力,分析卷积完全匹配层的截断误差。计算结果显示:积分形式的共形卷积完全匹配层可有效截断波导器件的开放端口。Based on conformal construction of the physical model in the three-dimensional orthogonal mesh system, an inte- gral-based conformal convolutional perfectly matched layer（CPML） algorithm is given for solving the open port truncation prob- lem when the enlarged cell technique combining with conformal finite-difference time-domain （ECT-CFDTD） method is used to simulate the wave propagation inside a hollow waveguide, and the algorithm has the same numerical stability as the ECT-CFDTD method. For the evanescent wave long-time propagation problems in a waveguide, several numerical simulations are done to ana- lyse the reflection error by conducting sweeps of constitutive parameters of the integral-based conformal CPML. Numerical results show that the integral-based conformal CPML can be used for efficiently truncating the open port of the waveguide.

关 键 词：波导 开放端口 共形 卷积完全匹配层 全局稳定性一致 

分 类 号：O441.4[理学—电磁学]