Analysis of millimeter-wave Fabry-Perot cavities using the FDTD technique

The finite-difference time-domain (FDTD) technique combined with periodic b oundary conditions (PBC's) is applied to the study of infinite periodic thr ee-dimensional structures excited by normally incident plane waves. Berenge r's PML (perfectly matched layers) are employed as absorbing boundary condi tions to simulate free space. The method takes into account dielectric and metallic losses, It has been developed to study plane parallel Fabry-Perot cavities with two-dimensional metal mesh mirrors. Experimental results in t he 60 GHz band show good agreement with simulation.