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Inverted-S Antenna with Wideband Circular Polarization and Wide Axial Ratio Beamwidth

Zhang, Long, Gao, Steven, Luo, Qi, Young, Paul R., Li, QX (2016) Inverted-S Antenna with Wideband Circular Polarization and Wide Axial Ratio Beamwidth. IEEE Transactions on Antennas and Propagation, 65 (4). pp. 1740-1748. ISSN 0018-926X. (doi:10.1109/TAP.2016.2628714) (KAR id:58448)

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Official URL
https://doi.org/10.1109/TAP.2016.2628714

Abstract

A novel broadband circularly polarized (CP) antenna with wide axial ratio (AR) beamwidth is proposed. It is composed of two curved arms shaped like an inverted “S”. The mechanisms of wideband CP operation and wide AR beamwidth are explained. To validate the concept, a prototype at C-band is manufactured and measured. Experimental results confirm that the antenna achieves an impedance bandwidth of 63% and a CP bandwidth of 42%. Furthermore, maximum AR beamwidth of 140o is achieved and wide AR beamwidth can be maintained in a frequency bandwidth of 35% in nearly all elevation planes. In addition, the antenna has the advantage of being easily extended to arrays. A 4-element array using the proposed antenna is investigated through both simulations and experiments, and achieves 60% CP bandwidth and wide AR beamwidth. The proposed inverted-S antenna can realize wide CP bandwidth and wide AR beamwidth, and is easy to form wideband CP arrays.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2016.2628714
Subjects: T Technology
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Tina Thompson
Date Deposited: 08 Nov 2016 09:33 UTC
Last Modified: 16 Feb 2021 13:38 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/58448 (The current URI for this page, for reference purposes)
Gao, Steven: https://orcid.org/0000-0002-7402-9223
Young, Paul R.: https://orcid.org/0000-0002-3707-2441
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