Special Shaped Compact Dual Ultra-Wideband Dielectric Resonator Antenna for Sub-6 GHz and Satellite Wireless Communications

In this paper, a compact dual ultra-wideband dielectric resonator antenna (DRA) for C and Ku bands applications is presented and discussed. Two approaches were used to enhance the antenna's bandwidth and to shift the resonant frequency to a lower frequency range to suit the sub-6 GHz category of fifth-generation wireless communication. The first method is by using multi-layers of the DRA material, and the second approach is by inserting air gaps between these layers. The proposed antenna design achieved a high bandwidth over two frequency ranges with fractional bandwidth (FBW) of 58.1 % and 29.5 %, which makes it suitable for satellite wireless communications.