Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications
This paper presents a wideband circularly polarized (CP) antenna array using a miniaturized double box branch-line coupler. This was achieved by creating a slow wave structure by introducing open-circuit stubs on the inside arms of the branch-line coupler. The 2×2 antenna array is made of four CP sl...
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| Format: | Article |
| Language: | English |
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Wiley Open Access, Institution of Engineering and Technology (IET)
2023
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| Online Access: | https://repository.londonmet.ac.uk/8798/1/IET-Microwaves-Antenna-Prop-2023-Virdee-Novel-antenna-array-configuration-using-miniature-double-box-branch%E2%80%90line.pdf |
| _version_ | 1804072942679621632 |
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| author | Virdee, Bal Singh Aribi, Tohid Sedghi, Tohid |
| author_facet | Virdee, Bal Singh Aribi, Tohid Sedghi, Tohid |
| author_sort | Virdee, Bal Singh |
| collection | LMU |
| description | This paper presents a wideband circularly polarized (CP) antenna array using a miniaturized double box branch-line coupler. This was achieved by creating a slow wave structure by introducing open-circuit stubs on the inside arms of the branch-line coupler. The 2×2 antenna array is made of four CP slot radiating elements excited through 1×4 feeding network. Moreover, sequentially rotation method is used to increase the axial-ratio (AR) bandwidth of the array. The CP slot radiating element is fed by coplanar waveguide (CPW). The feedline of the horn-shaped radiator includes a circular matching stub. Ground connected asymmetric T-shaped stub, a pair of grounded L-shaped square strips, and single strip line are shown to induce CP and enhance the antenna’s 3 dB impedance bandwidth and AR performance. The antenna constituting the array has impedance bandwidth of 2.45 GHz from 4.8-7.25 GHz that corresponds to a fractional bandwidth of 40%, and its 3 dB axial-ratio extends between 4.8-6.25 GHz. Compared to a conventional double-box branch-line coupler the size of the proposed coupler is reduced by 35% by increasing the capacitance of the coupler’s arms. This also is shown to increase the impedance bandwidth of the coupler. A 2×2 array was fabricated, and its performance verified. Measured results confirm the proposed antenna array exhibits CP covering the bands of WiMAX IEEE 802.16, C-band and ITU-R F386.9. The measured 3 dB AR bandwidth of the antenna array extend from 3 GHz to 7.3 GHz and its impedance bandwidth extends from 3.2 GHz to 9.0 GHz. The antenna array radiates with a peak gain of 11.5 dBic. |
| first_indexed | 2024-07-09T04:07:10Z |
| format | Article |
| id | oai:repository.londonmet.ac.uk:8798 |
| institution | London Metropolitan University |
| language | English |
| last_indexed | 2024-07-09T04:07:10Z |
| publishDate | 2023 |
| publisher | Wiley Open Access, Institution of Engineering and Technology (IET) |
| record_format | eprints |
| spelling | oai:repository.londonmet.ac.uk:87982023-12-20T14:21:07Z http://repository.londonmet.ac.uk/8798/ Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications Virdee, Bal Singh Aribi, Tohid Sedghi, Tohid 600 Technology 620 Engineering & allied operations This paper presents a wideband circularly polarized (CP) antenna array using a miniaturized double box branch-line coupler. This was achieved by creating a slow wave structure by introducing open-circuit stubs on the inside arms of the branch-line coupler. The 2×2 antenna array is made of four CP slot radiating elements excited through 1×4 feeding network. Moreover, sequentially rotation method is used to increase the axial-ratio (AR) bandwidth of the array. The CP slot radiating element is fed by coplanar waveguide (CPW). The feedline of the horn-shaped radiator includes a circular matching stub. Ground connected asymmetric T-shaped stub, a pair of grounded L-shaped square strips, and single strip line are shown to induce CP and enhance the antenna’s 3 dB impedance bandwidth and AR performance. The antenna constituting the array has impedance bandwidth of 2.45 GHz from 4.8-7.25 GHz that corresponds to a fractional bandwidth of 40%, and its 3 dB axial-ratio extends between 4.8-6.25 GHz. Compared to a conventional double-box branch-line coupler the size of the proposed coupler is reduced by 35% by increasing the capacitance of the coupler’s arms. This also is shown to increase the impedance bandwidth of the coupler. A 2×2 array was fabricated, and its performance verified. Measured results confirm the proposed antenna array exhibits CP covering the bands of WiMAX IEEE 802.16, C-band and ITU-R F386.9. The measured 3 dB AR bandwidth of the antenna array extend from 3 GHz to 7.3 GHz and its impedance bandwidth extends from 3.2 GHz to 9.0 GHz. The antenna array radiates with a peak gain of 11.5 dBic. Wiley Open Access, Institution of Engineering and Technology (IET) 2023-11 Article PeerReviewed text en cc_by_nc_nd_4 https://repository.londonmet.ac.uk/8798/1/IET-Microwaves-Antenna-Prop-2023-Virdee-Novel-antenna-array-configuration-using-miniature-double-box-branch%E2%80%90line.pdf Virdee, Bal Singh, Aribi, Tohid and Sedghi, Tohid (2023) Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications. IET Microwaves, Antennas & Propagation, 17 (14). pp. 1023-1032. ISSN 1751-8725 https://doi.org/10.1049/mia2.12388 10.1049/mia2.12388 |
| spellingShingle | 600 Technology 620 Engineering & allied operations Virdee, Bal Singh Aribi, Tohid Sedghi, Tohid Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications |
| title | Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications |
| title_full | Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications |
| title_fullStr | Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications |
| title_full_unstemmed | Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications |
| title_short | Novel antenna array configuration using miniature double box branch-line couplers for wideband circularly polarized applications |
| title_sort | novel antenna array configuration using miniature double box branch line couplers for wideband circularly polarized applications |
| topic | 600 Technology 620 Engineering & allied operations |
| url | https://repository.londonmet.ac.uk/8798/1/IET-Microwaves-Antenna-Prop-2023-Virdee-Novel-antenna-array-configuration-using-miniature-double-box-branch%E2%80%90line.pdf |
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