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International Journal of Antennas and Propagation
Volume 2012, Article ID 954742, 8 pages
http://dx.doi.org/10.1155/2012/954742
Research Article

Design of Compact Dual-Polarized Antennas for MIMO Handsets

State Key Laboratory on Microwave and Digital Communications, Tsinghua University, Beijing 100084, China

Received 11 June 2011; Accepted 19 July 2011

Academic Editor: Yuan Yao

Copyright © 2012 Wenhua Chen 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

A design method of compact dual-polarized antennas has been proposed for multiple input and multiple output (MIMO) handset application. For the sake of high isolation in dual polarizations, a printed monopole and a hybrid slot antenna are combined using a coplanar waveguide (CPW) and microstrip hybrid feeding structure. The proposed topology will result in orthogonal current distribution modes for the different polarizations, which effectively reduces the mutual coupling of the two modes. The operation mechanism of the feeding structure is analyzed in principle and verified by simulation. Simulated and measured results show this compact dual-polarized antenna achieves isolation between the two ports of better than 25 dB, and the relative bandwidth is wider than 23.5%.