Wideband Circularly Polarized MIMO Antenna for Sub 6 GHz 5G Application

Abstract

A broadband circularly polarized multiple-input multiple-output (MIMO) antenna for Sub 6 GHz 5G application is presented. The MIMO antenna has been designed on FR4 substrate and each printed monopole antenna is connected to a coaxial feed. To enhance antenna gain, a reflector is placed below the antenna. The bandwidth of 10 dB return loss with a 3 dB axial ratio is 36.14% from 3.4 to 4.9 GHz meanwhile transmission coefficients are less than -20 dB.