Design of a single circular soft surface applied to an aperture fed Dielectric Resonator antenna for gain and bandwidth improvement

In this paper, a novel design of a new broadband and high gain hybrid antenna is presented. The proposed antenna structure consists of a Dielectric Resonator (DR), an intermediate substrate a microstrip fed slot, and a circular soft surface. With the integration of these different elements, a wide bandwidth response and a high gain are achieved. The cylindrical soft structure is composed of a single metallic strip that is shorted to the ground through two sets of periodic vias. CST Microwave Studio software package is used to investigate the antenna. The input impedance, the gain, and the far field patterns have been analyzed. Furthermore, the proposed antenna is compared to another one which has three rings ant three sets of vias. It is accessed that the electromagnetic characteristics of a dielectric resonator antenna (DRA) can be improved by adding an intermediate substrate and a circular soft surface. The gain can be enhanced to near 6 dBi.