Differentially-Driven Dielectric Resonator Antenna using TE 20 Mode Substrate Integrated Waveguide

This paper presents a differentially fed rectangular dielectric resonator antenna (DRA) for millimeter-wave applications. The intrinsic field distribution of TE 20 mode of substrate integrated waveguide (SIW) allows the differential excitation of DRA by utilizing dual-slot located on the top wall of SIW. The proposed antenna is designed at 28 GHz and possess the impedance bandwidth of 4.3%, covering the frequency range of 27.4–28.6 GHz. The proposed antenna radiates in the broadside direction and the difference between the co-polarized and the cross polarized level is greater than 20 dB in XZ-plane and 30 dB in YZ-plane. The simulated peak gain of the proposed antenna is 4.54 dBi at 28 GHz. The proposed antenna can be utilized to design multiple-input multiple-output antennas and antenna arrays for next generation 5G communication system.