Planar Helical Antenna of Circular Polarization
A planar helical antenna is presented for achieving wideband end-fire radiation of circular polarization while maintaining a very low profile. The helix is formed using printed strips with straight-edge connections implemented by plated viaholes. The currents flowing on the strips and along via-hole...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/82919 http://hdl.handle.net/10220/40355 |
| _version_ | 1824456238973321216 |
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| author | Chen, Zhuozhu Shen, Zhongxiang |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Chen, Zhuozhu Shen, Zhongxiang |
| author_sort | Chen, Zhuozhu |
| collection | NTU |
| description | A planar helical antenna is presented for achieving wideband end-fire radiation of circular polarization while maintaining a very low profile. The helix is formed using printed strips with straight-edge connections implemented by plated viaholes. The currents flowing on the strips and along via-holes of the helix contribute to the horizontal and vertical polarizations, respectively. Besides, the current on the ground plane is utilized to weaken the strong amplitude of the horizontal electric field generated by the one on the strips. Thus, a good circular polarization can be achieved. Furthermore, a tapered helix and conducting side-walls are employed to broaden the axial ratio (AR) bandwidth as well as to improve the end-fire radiation pattern. The designed antenna operates at the center frequency of 10 GHz. Simulated results show that the planar helical antenna achieves wide-impedance bandwidth (|S11| <; -10 dB) from 7.4 to 12.8 GHz (54%) and 3-dB AR bandwidth from 8.2 to 11.6 GHz (34%), while retaining a thickness of only 0.11λ0 at the center frequency. A prototype of the proposed antenna is fabricated and tested. Measured results are in good agreement with simulated ones. |
| first_indexed | 2025-02-19T03:50:56Z |
| format | Journal Article |
| id | ntu-10356/82919 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:50:56Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/829192020-03-07T13:57:24Z Planar Helical Antenna of Circular Polarization Chen, Zhuozhu Shen, Zhongxiang School of Electrical and Electronic Engineering Circular polarization End-fire Helical antenna Low profile A planar helical antenna is presented for achieving wideband end-fire radiation of circular polarization while maintaining a very low profile. The helix is formed using printed strips with straight-edge connections implemented by plated viaholes. The currents flowing on the strips and along via-holes of the helix contribute to the horizontal and vertical polarizations, respectively. Besides, the current on the ground plane is utilized to weaken the strong amplitude of the horizontal electric field generated by the one on the strips. Thus, a good circular polarization can be achieved. Furthermore, a tapered helix and conducting side-walls are employed to broaden the axial ratio (AR) bandwidth as well as to improve the end-fire radiation pattern. The designed antenna operates at the center frequency of 10 GHz. Simulated results show that the planar helical antenna achieves wide-impedance bandwidth (|S11| <; -10 dB) from 7.4 to 12.8 GHz (54%) and 3-dB AR bandwidth from 8.2 to 11.6 GHz (34%), while retaining a thickness of only 0.11λ0 at the center frequency. A prototype of the proposed antenna is fabricated and tested. Measured results are in good agreement with simulated ones. Accepted version 2016-03-31T08:55:58Z 2019-12-06T15:08:14Z 2016-03-31T08:55:58Z 2019-12-06T15:08:14Z 2015 Journal Article Chen, Z., & Shen, Z. (2015). Planar Helical Antenna of Circular Polarization. IEEE Transactions on Antennas and Propagation, 63(10), 4315-4323. https://hdl.handle.net/10356/82919 http://hdl.handle.net/10220/40355 10.1109/TAP.2015.2463746 en IEEE Transactions on Antennas and Propagation © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/TAP.2015.2463746]. 9 p. application/pdf |
| spellingShingle | Circular polarization End-fire Helical antenna Low profile Chen, Zhuozhu Shen, Zhongxiang Planar Helical Antenna of Circular Polarization |
| title | Planar Helical Antenna of Circular Polarization |
| title_full | Planar Helical Antenna of Circular Polarization |
| title_fullStr | Planar Helical Antenna of Circular Polarization |
| title_full_unstemmed | Planar Helical Antenna of Circular Polarization |
| title_short | Planar Helical Antenna of Circular Polarization |
| title_sort | planar helical antenna of circular polarization |
| topic | Circular polarization End-fire Helical antenna Low profile |
| url | https://hdl.handle.net/10356/82919 http://hdl.handle.net/10220/40355 |
| work_keys_str_mv | AT chenzhuozhu planarhelicalantennaofcircularpolarization AT shenzhongxiang planarhelicalantennaofcircularpolarization |