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An Ultra-Wideband Circularly Polarized Asymmetric-S Antenna With Enhanced Bandwidth and Beamwidth Performance

He, Wei, Zhang, Long, He, Yejun, Wong, Sai-Wai, Mao, Chunxu, Chu, Peng, Ge, Lei, Gao, Steven (2019) An Ultra-Wideband Circularly Polarized Asymmetric-S Antenna With Enhanced Bandwidth and Beamwidth Performance. IEEE Access, 7 . pp. 134895-134902. ISSN 2169-3536. (doi:10.1109/ACCESS.2019.2941551) (KAR id:80520)

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This paper introduces an ultra-wideband circularly polarized (CP) asymmetric-S antenna with wide axial ratio beamwidth (ARBW) for C-band applications. The proposed antenna is realized by bending a linearly polarized dipole into asymmetric-S shape with variable trace width, which achieves CP radiation. Unlike the reported symmetric-S antenna, the proposed antenna is constituted with two unequal curved arms to enhance the bandwidth and beamwidth performances. Compared with the symmetric-S antenna, the proposed antenna demonstrates much wider AR bandwidth and wider ARBW over broader frequency range. A prototype is fabricated to verify the design principle. The measured and simulated results are very consistent and both indicate that the proposed antenna has a wide impedance bandwidth (VSWR <; 2) of 70.2% (3.58 to 7.46 GHz), and a wide 3-dB AR bandwidth of 84.8% (2.75 to 6.8 GHz). Moreover, maximum ARBW of 153° is achieved, and a 3-dB ARBW of more than 100° is maintained within a wide operation bandwidth of 46.3% (3.65-5.85 GHz).

Item Type: Article
DOI/Identification number: 10.1109/ACCESS.2019.2941551
Uncontrolled keywords: Circularly polarized antenna, wide axial ratio beamwidth, ultra-wideband antenna
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Steven Gao
Date Deposited: 16 Mar 2020 16:40 UTC
Last Modified: 16 Feb 2021 14:12 UTC
Resource URI: (The current URI for this page, for reference purposes)
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