A Compact Wideband Rectangular Dielectric Resonator Antenna using Perforations and Edge Grounding

Abstract

A compact wideband rectangular dielectric resonator antenna (RDRA) is investigated and presented. Perforations improve bandwidth by lowering down the quality factor. The perforations are an array of symmetrical square-shaped slots drilled uniformly on the RDRA. On choosing the optimal size of slots and distance between two consecutive slots, the fundamental TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">111</sub> mode of the RDRA is preserved. This aids in making the geometry compact by employing edge grounding. The coaxial probe acts like a monopole that further improves bandwidth by matching, monopole, and higher-order TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">131</sub> -like mode of the RDRA in the frequency band (2.72-4.3 GHz). The proposed geometry offers a wide impedance bandwidth of 56% for . The measured results show that the radiation efficiency of the proposed antenna is above 85% for the complete bandwidth with the stable radiation pattern.