Abstract A typical 5G multiple-input and multiple-output (MIMO) system must combine a high number of antennas at both the transmitter receiver to realize spatial multiplexing capability. In this paper, wideband 16- element indoor base station (BS) antenna array that can cover 3.3–6.0 GHz is proposed for applications. π-shaped monopole designed Lower band (LTE bands 42/43–N77–N78), intermediate ...