The multiplexing gain for multiple-input multiple-output (MIMO) antenna for both multi-user and single-user MIMO and sum rate loss for MIMO antenna for multi-user MIMO are introduced. Several case studies for finding these new performance metrics of MIMO antennas are also discussed. Unlike existing MIMO antenna performance metrics in the literature, these new parameters had ensured proper characterization of MIMO antenna performance with respect to MIMO wireless communications.

This paper is submitted to  2022 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON) .