一种适用于ADI-FDTD法的非分裂式完全匹配层

An Unsplit Perfectly Matched Layer for ADI-FDTD Algorithm

基于FDTD法中场量D-H(电位移矢量-磁场强度)迭代公式,导出了适用于AD I-FDTD法的场量非分裂式完全匹配层(PML)的实现方案,与现有的其它AD I-FDTD法的PML技术相比,具有物理概念清晰、易于操作并节省计算机资源的优点。数值结果证明:该PML技术能有效地解决吸收边界的问题,为AD I-FDTD法的发展与推广应用提供了条件。

Based on an unsplit perfectly matched layer (PML) for FDTD, this paper presents a modified ADI-FDTD scheme (D-H fields formulation)and a corresponding novel PML technique for ADI-FDTD algorithm. Both of them are more efficient than those previously reported. Especially, this PML technique solves the absorbing boundary condition of ADI-FDTD in a clear and simple way. Numerical results demonstrate that this PML technique is valid while the required computational resource is reduced substantially as compared to existing approaches.