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International Journal of Antennas and Propagation
Volume 2017, Article ID 6193102, 6 pages
https://doi.org/10.1155/2017/6193102
Research Article

High Isolation Dual-Polarized Patch Antenna with Hybrid Ring Feeding

School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China

Correspondence should be addressed to Xian-Jing Lin; nc.ude.tucs.liam@niljxee

Received 11 January 2017; Revised 24 February 2017; Accepted 11 April 2017; Published 3 May 2017

Academic Editor: Paolo Baccarelli

Copyright © 2017 Xian-Jing Lin 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

This paper presents a hybrid ring feeding dual-polarized patch antenna with high isolation in a wide working band. The proposed antenna consists of a circular radiating patch printed on the upper horizontal substrate, two pairs of shaped strips printed on two vertical substrates, and a hybrid ring feeding network printed on the lower two horizontal substrates. The proposed antenna adopts shape strips coupled feeding structure to achieve a wide operating band. Furthermore, a hybrid ring feeding structure with high isolation in a wide bandwidth, which is firstly proposed, is applied as feeding network. When one port is excited, the feeding network can realize twice the power cancellation. Thus, high ports isolation characteristics can be obtained. A prototype of the proposed antenna is fabricated and measured. Measured results show that the 10 dB reflection coefficient bandwidths of the two ports are both about 38.7%, with port isolation higher than 40 dB through most of the band, and the cross-polarizations are below −24 dB.