Efficient Numerical Analysis for Aperture-coupled Microstrip Antenna

Abstarct--This article provides an accurate and computationally efficient method for the analysis of aperture coupling from microstrip line to microstrip patch, which is of significant interest in applications involving multilayered media. The accuracy of this method is ensured by satisfying all the boundary conditions through a mixed electric–magnetic current integral equation formulation, combined with the moment method. Computational efficiency is achieved by limiting the discretization to only the strips and apertures and by using the accurate and rapidly convergent complex images. Close agreement has been obtained between our results for the input impedance, published results, and experiment, over a wide frequency range.