Circular polarization benefits in outdoor to indoor scenarios for MIMO cellular networks

MIMO transmission scheme equipped with cross linear polarization antennas has been widely used in mobile radio networks. However, some realistic measurement results show that MIMO scheme equipped with circular polar antennas also has some benefits in live mobile radio networks. In this paper, the penetration capability for linear and circular polarization is studied. Our theoretical analysis shows that circular polar antenna has higher penetration capability than linear polar antenna. Moreover, the measurement campaign is conducted to verify our analysis. It means that the application of circular polarization for MIMO transmission will be a promising method in outdoor to indoor environments.