DYNAMIC ANALYSIS OF A MICROSTRIP LINE OVER A PERFORATED GROUND PLANE

A full wave analysis is presented to compute the characteristic impeda nce and propagation constant of a microstrip line over a perforated gr ound plane. The perforations in the ground plane are modeled by equiva lent magnetic currents. The method of moments is applied to solve the coupled integral equations for the unknown electric current on the mic rostrip line and the unknown magnetic currents in the apertures. The f ields are formulated using the space domain Sommerfeld type Green's fu nctions. The matrix pencil technique is used to obtain the amplitude a nd the propagation constant of the fundamental modes for both current and the voltage on the microstrip line. Typical numerical results are given.