Wideband Circularly Polarized Millimeter Wave Dielectric Resonator Antenna with defected ground structure for 5G Communications

Abstract

A wideband Right hand circular polarized (RHCP) millimeter wave dielectric resonator antenna (DRA) has been designed here for 5G frequency bands of band 30. A band width of 2.36GHz centered at 26GHz is observed. The simulated gain of the antenna is 5dB and the polarization bandwidth at 3dB is 1.2GHz. The circularly polarized DRA designed here is right hand circularly polarized and is excited with the mode TE1y2. The probe fed technique used here offers wide bandwidth which makes the antenna more suitable for 5G applications. The microstrip coupled technique is used here with a defected ground structure to minimize the back propagation. A conformal strip is used to reduce the air gap between the DRA and the probe.