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New Hybrid Rectangular Dielectric Resonator Antenna with Enhanced Bandwidth

This paper introduces a simple and low-cost method to increase the bandwidth of a slot-fed rectangular dielectric resonator antenna. In this method, two parallel rectangular metallic strips are added to the two parallel flat sides of the DRA which are normal to the feeding slot. The metallic strips form a parallel-plate waveguide resonator and create two extra resonances resulting in a wider bandwidth. The efficiency of the method is evaluated by computer simulations. It is shown that a bandwidth enhancement of 40% is achieved for a rectangular DRA at the center frequency of 4.2 GHz.