AN extension of the PML technique to the fdtd analysis of multilayer planar circuits and antennas

The perfectly matched layer (PML) technique is extended to structures including different dielectric layers and transmission lines. It is applied to the rigorous finite difference‐time‐domain (FDTD) analysis of a microstrip line and of a microstrip antenna. Comparisons with Mur absorbing boundary conditions (ABCs) and with experiments are included.