A polarization-controlled MIMO antenna with an optimum phase shift in accordance with various use scenarios

This paper presents a polarization-controlled MIMO antenna to realize ultra high-speed and high-capacity mobile communications. The proposed antenna is comprised of three orthogonal dipoles, which can be controlled using a weight function created based on the variation of cross polarization power ratio (XPR) and the antenna inclination angle. By adjusting a phase shift between the antenna elements to an optimum value in accordance with various use scenarios and XPRs, the MIMO channel capacity is increased significantly in comparison with a conventional fixed-phase shift antenna.