A Circularly-Polarized Patch Antenna Design for 3.6 GHz Applications in 5G Systems

This study introduces a new simple-structured circularly polarized (CP) patch antenna for sub 6 GHz fifth-generation (5G) front-end systems. Its layout contains a circular radiation patch with a pair of rectangular slits. The inserted rectangular slits improve the antenna characteristics of the operation band and axial ratio. The antenna is fed by a 50-Ohm coaxial port. It is designed on an FR-4 dielectric substrate having 4.4 permittivity which was fed by a coaxial connector from the bottom layer with a full ground plane. The suggested patch antenna is designed to resonate at 3.6 GHz and provides sufficient impedance and axial bandwidths. Additionally, its linear and planar array forms have been discussed in simulations. Promising results have been discovered concerning S-parameters, antenna radiation, and gain levels, making the suggested design suitable for a variety of 5G front-end applications such as cognitive radio, base stations, satellite communication, imaging, and radar.