A Compact Spherical Dual-Polarized Antenna Array for 5G Wireless Communication

Two novel dual-polarized antenna array units and a new method to fabricate compact spherical antenna array for 5G wireless channel characterization are proposed in this paper. The traditional planar metallic reflectors are replaced by polyhedral reflectors in our antenna arrays, through which the distance between each antenna units is controlled to half of the wavelength. The relative bandwidth of the proposed antenna array units are 62.1% and 63.3%. The mutual coupling of two ports is below −20 dBi. And the maximum gain of two types of antenna array units is from 4.58 dBi to 6.52 dBi.