Resonance frequency calculation of spherical microstrip structure using hybrid technique

In this paper the spherical microstrip structure is considered. The structure is composed of a metallic patch with an arbitrary shape placed on a dielectric coated metallic sphere. In the analysis the hybrid technique is utilized. In this approach the finite-difference technique is applied in a cavity model to determine the current basis functions on the patch. Next, using method of moments, the resonance frequency of the structure and radiation pattern are calculated. The results of the proposed approach are compared with those obtained from commercial software and those published in the literature.