应用UPML的FDTD法计算平面微带电路

采用非分裂式理想匹配层（UPML）的时域有限差分（FDTD）法对矩形微带天线及低通滤波器等微带电路进行了分析计算，给出了时域和频域的仿真结果。与其他的理想匹配层（PML）相比，UPML利用D和H，物理概念明确，将PML区域与FDTD计算域隔离开来，并且减少了PML吸收边界计算所占用的存储量。从仿真结果看，该方法有效且极大减少了迭代次数。

UPML absorbing boundary condition of the FDTD for planar microstrip circuits

An Unsplit Perfectly Matched Layer（UPML） for Finite Difference Time Domain（FDTD） was used in the analysis of planar microstrip circuits. This unsplit formulation based on the D-H algorithm could isolate the PML from the rest of the FDTD computation field. And due to that it did not require the fields to be split, this method was easy to be implemented. Numerical results demonstrated that unlike the split step formulation, this method required almost no additional computational resources and reduced the time of iteration.