Dual Polarized Planar MIMO Antenna for 5G Base Station Applications

This article presents a low profile dual polarized multi-layered planar MIMO antenna for Sub 6GHz n78 band 5G base station applications. A conventional solution for the severe overload problem in deploying a more significant number of 3D MIMO antennas for base stations is discussed in this paper. A multi-layered planar MIMO antenna system with an element spacing of 0.5λ
0
is designed to operate at 3.5 GHz with a bandwidth of 130MHz and an isolation level of 20dB. A dual polarization technique is employed to combat the problem of interference and multipath fading. The proposed design provides a reasonable gain value of 8.75 dBi for two-element planar MIMO and makes it suitable for 5G Advanced Antenna Systems (AAS). The performance of the MIMO system is validated by calculating the Envelope Correlation Coefficient (ECC) and Diversity Gain (DG).