An anisotropic perfectly matched layer (APML) absorber for mesh truncation in the context of a multiresolution time domain scheme

We have applied an anisotropic perfectly matched layer (APML) type of absorber for mesh truncation in the context of a three-dimensional multiresolution time domain (MRTD) scheme. We have developed a generalized APML update algorithm to handle the faces, edges and corners of the APML regions in the MRTD formulation that retains the philosophy of the leapfrog algorithm of the conventional finite difference time domain (FDTD) method. We have validated the algorithm by analyzing the performance of an open microstrip line, and have shown that the APML does an excellent job of absorbing the electromagnetic waves when implemented in the MRTD algorithm.