A moment method analysis of an aperture coupled rectangular dielectric resonator antenna

An efficient but rigorous model based on the surface integral equation (SIE) approach is proposed for the analysis of the antenna. The dielectric resonator (DR) is modeled in terms of equivalent surface electric and magnetic currents using combined field integral equations (CFIE) formulation. The CFIE, the microstrip feedline and the associated coupling mechanism are formulated as a set of coupled equations in the spatial domain in the form of the mixed potential integral equations (MPIE). The coupled integral equations are solved by use of the method of moments (MoM) using Galerkin´s procedure. In the microstrip region, closed-form Green´s functions are employed in the calculation to enhance the numerical efficiency. It is demonstrated that the proposed model is very economical in usage of computer resources for generating accurate results for the input impedance.