Design of a Circularly Polarized Parasitic Array With Slot-Coupled DRA With Improved Gain for the 5G Mobile System

A high-gain circularly polarized dielectric resonator antenna is proposed for the fifth generation of a mobile network. The parasitic elements are used to increase the antenna gain. By choosing suitable spacings among the elements, a significant increase in the gain of antenna can be obtained with no degradation in pattern characteristics. The dielectric constants of all elements are identical. The excited element is fed through an X-shaped slot coupled to a 50 Ω microstrip line. The proposed structure is designed, simulated, fabricated, and measured. The results show that the proposed antenna has about 5 GHz (17.8%) bandwidth, about 2.2 GHz axial ratio bandwidth, and also its gain is around 10.5 dB, which meet the requirements of the fifth generation mobile network.