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A Compact Wideband Dual-Polarized Antenna With Enhanced Upper Out-of-Band Suppression

Wen, Le-Hu, Gao, Steven, Luo, Qi, Yang, Qingling, Hu, Wei, Yin, Yingzeng, Ren, Xiaofei, Wu, Jian (2019) A Compact Wideband Dual-Polarized Antenna With Enhanced Upper Out-of-Band Suppression. IEEE Transactions on Antennas and Propagation, 67 (8). pp. 5194-5202. ISSN 0018-926X. E-ISSN 1558-2221. (doi:10.1109/TAP.2019.2911412) (KAR id:74519)

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https://doi.org/10.1109/TAP.2019.2911412

Abstract

A compact wideband dual-polarized antenna with enhanced upper out-of-band suppression is presented in this paper. The proposed antenna is equivalent as two electric dipoles and two magnetic dipoles by using the crossed shunt loops. The incorporation of the electric and magnetic dipoles makes the antenna achieve wide impedance bandwidth and compact radiator size. In addition, four parasitic strips are inserted near the inner edge of the four loops to enhance the antenna upper out-of-band suppression at 3.5 GHz with improved impedance bandwidth. The antenna is fed by the crossed coaxial baluns with high isolation. A shorting sheet is introduced into the baluns to further enhance the upper out-of-band suppression and create another rejection at 4.9 GHz. To demonstrate the design method, the proposed antenna prototype was fabricated and measured. Measured results show that the proposed antenna has a wide impedance bandwidth of 1.625-3.05 GHz (61%) for S_11<-14 dB with the isolation better than 38.3 dB. The upper out-of-band suppression of the antenna is also largely enhanced with measured S_11>-2 dB from 3.35 GHz to 5.25 GHz. In addition, stable antenna gain and radiation patterns are achieved for base station applications.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2019.2911412
Uncontrolled keywords: Balun, dual-polarized antenna, electric dipole, magnetic dipole
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Steven Gao
Date Deposited: 21 Jun 2019 10:24 UTC
Last Modified: 16 Feb 2021 14:05 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/74519 (The current URI for this page, for reference purposes)
Wen, Le-Hu: https://orcid.org/0000-0001-9757-1114
Gao, Steven: https://orcid.org/0000-0002-7402-9223
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