Application of the PML absorber to the MRTD technique

The perfectly matched layer (PML) absorbing boundary condition is used in the two-dimensional multiresolution time domain (MRTD) technique in order to analyze open planar structures. The results are compared to those obtained by use of the conventional FDTD technique and substantial reductions in memory and execution time requirements are observed. The scheme is applied to the calculation of the characteristic impedance of a microstrip transmission line, as well as the field pattern of the first mode.