Split Ring Resonator Loaded Cylindrical Dielectric Resonator Antenna

Abstract

We present a novel technique for the miniaturization of dielectric resonator antennas (DRAs) based on the magneto-dielectric concept. This is achieved by artificially inducing a strong magnetic resonance inside the DRA with a split ring resonator. The HE _11δ mode of the cylindrical DRA is excited via the slot under the DRA. With a split ring resonator made of two metallic rods on the lateral side of the slot, the operation frequency of the DRA antenna shows a remarkable red-shift, i.e., a significant miniaturization of the antenna's electrical size. Numerical simulations confirm that nearly 50% size miniaturization is achieved, while the antenna efficiency remains higher over 60%.