Optimum phase shift applied to weighted-polarization MIMO antenna in various use scenarios

Abstract

This paper presents a method to achieve the maximum MIMO channel capacity using a weighted-polarization MIMO antenna. Particular emphasis is placed on the way to adjust the phase shift value between the antenna elements to an optimum value in accordance with the variation of cross polarization power ratio (XPR) and the antenna inclination angle. Both the measurement and analytical results show that using the optimum phase shift value, the MIMO channel capacity is increased in comparison with a conventional fixed-phase shift antenna in various conditions.