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International Journal of Antennas and Propagation
Volume 2014, Article ID 570923, 9 pages
http://dx.doi.org/10.1155/2014/570923
Research Article

Analysis of MIMO Diversity Improvement Using Circular Polarized Antenna

Network Technology Research Institute, China United Network Communications Corporation Ltd., Beijing 100048, China

Received 21 October 2013; Accepted 17 December 2013; Published 11 February 2014

Academic Editor: Yue Gao

Copyright © 2014 Jianquan Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

MIMO (Multiple Input Multiple Output) technique is one of the important means to enhance the system capacity. Diversity gain could be acquired by using traditional ±45° dual-polarized antenna, but in the scenario where multipath scattering is not strong, power-unbalance in two polarizations caused by polarization mismatching between transmitting and receiving antennas will reduce diversity gain. This problem can be effectively solved by using circular polarized antennas. In this paper, through theory analysis and test, the improvement of MIMO diversity gain using circular polarization antenna is analyzed.