Eight-Port Wideband MIMO Antenna for Sub-6 GHz 5G Base Stations

Abstract

[EN] An eight-port wide-band multiple-input multiple-output (MIMO) antenna is presented for base stations applications. The antenna is composed by four unit cells (2×2) separated by a cross-shaped isolating block with a total size of 220×220×28 mm ` (2.42¿×2.42¿×0.3¿ , at central frequency f=fc=3.3 GHz). The unit cell is defined by a square cavity-backed antenna fed with two I-shaped crossed dipoles. The antenna provides 8 independent ports with 21.5 dB of minimum isolation and an impedance bandwidth (S11<¿10dB) of 97% ranging at 1.8-5 GHz. Results show an efficiency higher than 87%, unidirectional radiation patterns and low envelope correlation coefficient. The geometry of the antenna is suitable for scaling this design to a massive MIMO system with the replication of the proposed antenna.This work has been supported by the Spanish Ministry of Science and Innovation (Ministerio de Ciencia e Innovacion) under project PID2019-107885GB-C32.Molins-Benlliure, J.; Cabedo Fabres, M.; Antonino Daviu, E.; Ferrando Bataller, M. (2021). Eight-Port Wideband MIMO Antenna for Sub-6 GHz 5G Base Stations. IEEE. 839-840. https://doi.org/10.1109/APS/URSI47566.2021.970472883984