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A Wideband Differentially Fed Dual-Polarized Antenna With Wideband Harmonic Suppression

Wen, Le-Hu, Gao, Steven, Luo, Qi, Yang, Qingling, Hu, Wei, Yin, Yingzeng, Ren, Xiaofei (2019) A Wideband Differentially Fed Dual-Polarized Antenna With Wideband Harmonic Suppression. IEEE Transactions on Antennas and Propagation, . ISSN 0018-926X. (doi:10.1109/TAP.2019.2920230) (KAR id:74159)

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http://dx.doi.org/10.1109/TAP.2019.2920230

Abstract

A wideband differentially fed dual-polarized antenna with wideband harmonic suppression is presented. The radiating structure is composed of open slots, stair-shaped strips, and a square patch. To realize symmetrical radiation and low cross-polarization for orthogonal polarizations, eight open slots are etched on the four corners of the square patch. Stair-shaped strips are not only used to excite the open slots, but also introduce the monopole resonance. In addition, patch resonance is excited on the center square patch. To match these different resonances, shorted microstrip lines are utilized to achieve the wide impedance bandwidth. Moreover, compact stepped impedance resonators are elaborately introduced on the top of the patch to achieve wideband harmonic suppression without any increase of the antenna footprint. To verify the design method, the proposed antenna is designed, fabricated, and measured. Measured results demonstrate that the proposed antenna has the impedance bandwidth of 1.70-2.81 GHz for Sdd11 < -15 dB with high isolation of 39 dB. Moreover, wideband harmonic suppression is measured from 3 GHz to 9 GHz with the Sdd11 higher than -2.2 dB and the corresponding harmonic gain lower than -5.3 dBi. In addition, stable gain of 7.2-7.9 dBi and beamwidth of 63-71º are achieved for base station applications.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2019.2920230
Uncontrolled keywords: Broadband, differentially fed antenna, harmonic suppression, stepped impedance resonator
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Steven Gao
Date Deposited: 29 May 2019 08:58 UTC
Last Modified: 16 Feb 2021 14:04 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/74159 (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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