中文摘要：

在完全匹配层（PML）中应用Z变换，和传统的引入PML的方法相比，得到的迭代公式的程序更方便、更简单；考虑到要模拟的时域有限差分（FDTD）计算区域的物质属性，采用了特殊的处理方法，并可运用到标准网格或非均匀网格中；数值实验验证了这种方法的有效性和吸收边界的吸收效果。

英文摘要：

In this paper,an algorithm of implementing the perfectly matched layer（PML） is presented for truncating finite difference time domain（FDTD）computational domains. Compared with the conventional method, this algorithm is based on incorporating the Z-transform method into the FDTD implementation. The advantage of this method is its simplicity and it can be applied to standard cells or unstandard cells. In addition, the iterative equations are independent of the material properties of the FDTD computational domains. Numerical examples demonstrate the validation of this algorithm.