波动方程FDTD算法的PML吸收边界条件的实现与验证  

Implementation and Validation of the PML Absorbing Boundary Condition for Wave Equation FDTD Method

作　　者：孔繁敏[1] 李康[1] 刘新[1] 郭毅峰[1] 

机构地区：[1]山东大学信息科学与工程学院,济南250100

出　　处：《微波学报》2004年第1期1-5,共5页Journal of Microwaves

基　　金：山东大学青年基金项目 (编号 :11170 0 5 1310 0 2 9)

摘　　要：实现了波动方程FDTD算法的PML吸收边界条件 (WE PML) ,并进行了数值验证。从结果可以看出 ,WE PML的性能与Berenger PML非常接近 ,优于Mur二阶近似吸收边界条件。同时 ,对PML媒质参数进行了优化 ,结果表明 :WE PML的性能主要是由PML的层数、垂直入射时的理论反射系数决定的 ,WEThe perfectly matched layer absorbing boundary condition for the wave equation FDTD method (WE PML) is implemented and validated. The results show this method can attain the same performance as Berenger-PML using the same PML parameters and is much better than Mur′ 2nd approximation absorbing boundary condition. In addition, the WE PML parameters are optimized. It is demonstrated that the performance of WE PML mainly depends on the thickness of the PML medium and the theoretical reflection factor at normal incidence. The optimized parameters of WE PML are in agreement with Gedney's experience values.

关 键 词：波动方程 FDTD PML 吸收边界条件 理想匹配层 时域有限差分法 电磁场 

分 类 号：TN011[电子电信—物理电子学]