Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern
A novel ultra-wideband (UWB) circularly polarized (CP) antenna array with sequential phase feed is proposed in this article. The element implements a multiresonance monopole to achieve UWB CP radiation. To investigate the CP operating mechanism, characteristic mode analysis is used to provide differ...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/162339 |
| _version_ | 1826110048255868928 |
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| author | Xu, Rui Shen, Zhongxiang Gao, Steven Shichang |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Xu, Rui Shen, Zhongxiang Gao, Steven Shichang |
| author_sort | Xu, Rui |
| collection | NTU |
| description | A novel ultra-wideband (UWB) circularly polarized (CP) antenna array with sequential phase feed is proposed in this article. The element implements a multiresonance monopole to achieve UWB CP radiation. To investigate the CP operating mechanism, characteristic mode analysis is used to provide different modes at various frequencies. The simulated characteristic mode analysis results show that this element can realize good CP at three independently adjustable frequencies (2.4, 3.8, and 5.8 GHz). By combining these three frequencies, a UWB CP antenna element is realized from 2.02 to 6.03 GHz for axial ratio (AR) less than 3.0 dB. Because the main radiating region of this element changes at different frequencies, a compact 2 × 2 array, whose profile is only 0.09λ (where λ is the wavelength in free space at the lowest operating frequency), is designed and optimized to achieve higher realized gain and stable radiation pattern. Subsequently, a prototype of this array is fabricated and measured. Measured results demonstrate an overlapping bandwidth of 120.9% from 1.8 to 7.3 GHz, in terms of the-10 dB reflection coefficient bandwidth and 3 dB AR bandwidth. This array has the advantages of simple structure, compact size, high gain, and stable pattern within the entire operating band. |
| first_indexed | 2024-10-01T02:28:26Z |
| format | Journal Article |
| id | ntu-10356/162339 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:28:26Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1623392022-10-14T07:45:56Z Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern Xu, Rui Shen, Zhongxiang Gao, Steven Shichang School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Characteristic Mode Analysis Circularly Polarized Antenna A novel ultra-wideband (UWB) circularly polarized (CP) antenna array with sequential phase feed is proposed in this article. The element implements a multiresonance monopole to achieve UWB CP radiation. To investigate the CP operating mechanism, characteristic mode analysis is used to provide different modes at various frequencies. The simulated characteristic mode analysis results show that this element can realize good CP at three independently adjustable frequencies (2.4, 3.8, and 5.8 GHz). By combining these three frequencies, a UWB CP antenna element is realized from 2.02 to 6.03 GHz for axial ratio (AR) less than 3.0 dB. Because the main radiating region of this element changes at different frequencies, a compact 2 × 2 array, whose profile is only 0.09λ (where λ is the wavelength in free space at the lowest operating frequency), is designed and optimized to achieve higher realized gain and stable radiation pattern. Subsequently, a prototype of this array is fabricated and measured. Measured results demonstrate an overlapping bandwidth of 120.9% from 1.8 to 7.3 GHz, in terms of the-10 dB reflection coefficient bandwidth and 3 dB AR bandwidth. This array has the advantages of simple structure, compact size, high gain, and stable pattern within the entire operating band. Nanyang Technological University National Research Foundation (NRF) This work was supported by the National Research Foundation (NRF), SMRT, and Nanyang Technological University, under the Corp Lab@University Scheme, which was conducted in the SMRTNTU Smart Urban Rail Corporate Laboratory. 2022-10-14T07:45:56Z 2022-10-14T07:45:56Z 2021 Journal Article Xu, R., Shen, Z. & Gao, S. S. (2021). Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern. IEEE Transactions On Antennas and Propagation, 70(2), 943-952. https://dx.doi.org/10.1109/TAP.2021.3111316 0018-926X https://hdl.handle.net/10356/162339 10.1109/TAP.2021.3111316 2-s2.0-85124607083 2 70 943 952 en IEEE Transactions on Antennas and Propagation © 2021 IEEE. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Characteristic Mode Analysis Circularly Polarized Antenna Xu, Rui Shen, Zhongxiang Gao, Steven Shichang Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern |
| title | Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern |
| title_full | Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern |
| title_fullStr | Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern |
| title_full_unstemmed | Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern |
| title_short | Compact-size ultra-wideband circularly polarized antenna with stable gain and radiation pattern |
| title_sort | compact size ultra wideband circularly polarized antenna with stable gain and radiation pattern |
| topic | Engineering::Electrical and electronic engineering Characteristic Mode Analysis Circularly Polarized Antenna |
| url | https://hdl.handle.net/10356/162339 |
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