Gain enhancement of a dielectric resonator antenna using a cylindrical electromagnetic crystal substrate

In this paper, a novel technique for the gain enhancement of dielectric resonator antennas using a cylindrical EBG structure has been proposed and demonstrated numerically. The analysis and design of the structure has been based on the fact that the surface wave propagation is reduced in all radial directions thanks to the circular symmetry of the proposed EBG structure. The EBG structure is based on the mushroom-like structure with a circular symmetry. It is composed of a periodic structure of metallic rings and of a periodic structure of vias. The periods of these two structures have been optimized using a full wave method to maximize the antenna gain. Numerical results have been presented showing that a gain enhancement of 3 dB is achieved with the new substrate. Experimental results will be presented during the conference.