A circularly polarized antenna design for 5G mobile communication

Circularly polarized antennas are widely used in many scenarios under the 5G communication standard, and they play a vital role in the development of 5G communication because of their miniaturization, higher applicable frequency band and better performance. In this paper, two coaxial feed points with a phase difference of 90 degrees are used to achieve circular polarization through the simultaneous action of two orthogonal linear polarizations under the condition that the radiation patch is not slotted or cut. HFSS is used for simulation analysis of the S-parameters, axial ratio, standing wave ratio, gain and electric field vector of the antenna. Antenna resonant frequency f = 3.54GHz, return loss is -14.27dB, less than 3 dB axial ratio performance is good. Standing wave ratio less than 2 bandwidth is 4.8%, which is greater than S11 < -10 dB bandwidth 4.24%, gain up to 7.2dB. 3D gain directivity is good.