TWO-RING SLOT-FED DIELECTRIC RESONATOR ANTENNA FOR DUAL-FREQUENCY OPERATION

摘要

A new feed structure for dielectric resonator antennas (DRAs) is proposed in order to achieve dual-frequency operation. This structure is composed of two ring slots etched on the ground plane, and one of them is fed by a gap source. By adjusting the structure parameters, the ring slots can excite the DRA to operate at dual frequencies. A hemispherical DRA is considered and the obtained results verify the proposed design.