Design of a 10-Port MIMO Antenna for 5G/WiFi Indoor Base Station Applications

A 10-port wide-band cavity-backed multiple-input multiple-output (MIMO) antenna with decagonal shape is presented for 5G/WiFi indoor base stations applications. For the design of the antenna a methodology based on sector unit cells is employed dividing the whole design in 10 equivalent sectors and only analyzing two cells for the prediction of the whole design performance. The proposed antenna has a total size of π×228.85
²
×37.27 mm
³
(π×1.63
²
λ
²
×0.49λ, at central frequency f=f
c
=3.9 GHz). The antenna is composed by 10 independent ports with 15 dB of minimum isolation and an impedance bandwidth (S
11
< −10 dB) of 130% (1.37-6.5 GHz). Simulated results show unidirectional radiation pattern, a total efficiency higher than 86% and low envelope correlation coefficient (ECC).