Dual polarized Antenna and Array with Filtering Response and Low Cross Polarization for 5G Millimeter Wave Applications

摘要

A millimeter wave (mmWave) dual polarized antenna with filtering response and low cross polarization for the fifth generation (5G) mobile communications is proposed. The isolation better than 20 dB between two feeding ports was achieved with the two ports in the same plane. The antenna is low profile with only 1.4 mm thickness including two dielectric layers and a bounding layer. The operating frequency band is from 26.5 GHz to 29.5 GHz, which can be applied to n257 5G mmWave band. In addition, a rotating sequence $2 imes 2$ antenna array is designed and measured. The same polarization is fed by a differential feeding network, which will further reduce the cross polarization of the array, the cross polarization is better than 20 dB.