As one of the key 5G technologies to meet high data rate e MBB scenario

large-scale antenna technology places higher requirements on antenna capabilities. China telecom operator already has the largest 64 TRX 5G 2.6 GHz AAU

which provides excellent network performance through Massive MIMO. In order to control the CAPEX and OPEX and meet the needs of some limited space scenarios

mobile operator introduced 32 TRX AAU and 8 TRX antenna to fl exibly adapt to various scenarios. In order to ensure the rationality of equipment selection in different construction scenarios

this paper combined with theoretical analysis and simulation research to give the principle for antenna selection of 5G 2.6 GHz based on building features.