A Wideband Differentially-Driven Dual-Polarized Antenna for 5G mmWave Terminal Application

A wideband differentially-driven dual-polarized magneto-electric (ME) dipole antenna suitable for 5G mmWave terminal application is presented in this paper. A cross-shaped strip differential feeding structure is designed to achieve the high port-to-port isolation and meanwhile reduce the profile height. For proof-of-concept demonstration, the proposed antenna is investigated, implemented and measured. The measurement results of the antenna show a wide overlapped impedance bandwidth of 60.9% (24.2-45.4 GHz) and the high isolation of better than 30 dB over the operating band. Apart from the broadband bandwidth, promising radiation characteristics including stable gain and radiation pattern, low cross-polarization level and large front-to-back ratio (FTBR) are of significance to practical applications as well.