A dual-band dual-polarized magneto-electric dipole antenna for 5G micro base station

Miniaturization is an important consideration for the design of 5G micro base station antennas. A magneto-electric dipole antenna suitable for 5G micro base stations has been designed and analyzed. The antenna consists of a pair of orthogonally placed single-polarized electromagnetic dipole antennas, a pair of cross-graded Γ-shaped feeders, a circular parasitic patch and a square reflector. Its working frequency band is 2.50−3.62 GHz and 4.8−5.0 GHz, which can cover all the mid-band of 5G specified by the Ministry of Industry and Information Technology. In the working frequency band, the input return loss of the antenna is less than −10 dB; the port isolation is less than −25 dB in the low frequency band and less than −42 dB in the high frequency band; the simulated average gain is 5.57 dBi and 9.84 dBi in the high and low frequency parts, respectively. The antenna can achieve dual frequency bands and dual polarization, which can be used as a reference for miniaturized micro base station antenna design. The antenna provides a reference for the commercialization of 5G antenna.