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Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method

Hisamatsu Nakano Orcid Logo, Tomoki Abe Orcid Logo, Amit Mehta Orcid Logo, Junji Yamauchi Orcid Logo

IEEE Transactions on Antennas and Propagation, Volume: 71, Issue: 7, Pages: 5616 - 5625

Swansea University Author: Amit Mehta Orcid Logo

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DOI (Published version): 10.1109/tap.2023.3267174

Abstract

When the circumference of a round metaloop antenna (RoMLA), made of C-type meta-atoms, is one guided wavelength (1λ g ) of the current on the loop, the RoMLA radiates a left-hand CP wave at frequency f N and a right-hand CP wave at frequency f H in the direction normal to the antenna plane. These CP...

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Published in: IEEE Transactions on Antennas and Propagation
ISSN: 0018-926X 1558-2221
Published: Institute of Electrical and Electronics Engineers (IEEE) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa63351
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spelling v2 63351 2023-05-05 Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method 8a1e5679707cf437cbfd17b72514b8a5 0000-0001-8073-2436 Amit Mehta Amit Mehta true false 2023-05-05 EEEG When the circumference of a round metaloop antenna (RoMLA), made of C-type meta-atoms, is one guided wavelength (1λ g ) of the current on the loop, the RoMLA radiates a left-hand CP wave at frequency f N and a right-hand CP wave at frequency f H in the direction normal to the antenna plane. These CP waves have different maximum gains. This paper discusses enhancement in the small gain, not affecting the inherent large gain. Such uncorrelated enhancement in the gain, named the isolated gain enhancement (IsoGE), differs from conventional correlated gain enhancement (non-IsoGE). For IsoGE, a parasitic ring is inserted into the open space of the RoMLA, while maintaining the low-profile RoMLA structure on the order of λ 0 /100 with λ 0 being the free-space operating wavelength. It is found that the ring finally transformed into a round patch is effective for the IsoGE, where the induced current on the patch contributes to increasing the small gain. The analysis, for the first time, shows that the axial ratio and VSWR are, respectively, less than 3 dB and 2 across the 3-dB gain bandwidths around f N and f H , as desired. Furthermore, the insertion of a square parasitic patch within the open space of a square metaloop antenna is also found to be effective for the IsoGE. Journal Article IEEE Transactions on Antennas and Propagation 71 7 5616 5625 Institute of Electrical and Electronics Engineers (IEEE) 0018-926X 1558-2221 Antennas, Gain, Metamaterials, Dual band. Loop antennas, Compounds, Extremities, circular polarization, dual-band metaloop antenna, meta-atom, uncorrelated gain enhancement 1 7 2023 2023-07-01 10.1109/tap.2023.3267174 http://dx.doi.org/10.1109/tap.2023.3267174 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University This work was supported in part by the Japan Society for the Promotion of Science (JSPS) KAKENHI under Grant JP21K04068. 2023-07-24T12:06:22.3477214 2023-05-05T09:50:24.8851595 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Hisamatsu Nakano 0000-0002-5559-1771 1 Tomoki Abe 0000-0003-2546-1797 2 Amit Mehta 0000-0001-8073-2436 3 Junji Yamauchi 0000-0002-1263-1913 4 63351__27704__e949cef6db7f4939b422872ef92f3865.pdf 63351.pdf 2023-06-05T10:37:31.8447922 Output 2600396 application/pdf Accepted Manuscript true true eng
title Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method
spellingShingle Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method
Amit Mehta
title_short Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method
title_full Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method
title_fullStr Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method
title_full_unstemmed Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method
title_sort Isolated Gain Enhancement for Dual-Band C-Metaloop Antennas Using a Coplanar Compound Method
author_id_str_mv 8a1e5679707cf437cbfd17b72514b8a5
author_id_fullname_str_mv 8a1e5679707cf437cbfd17b72514b8a5_***_Amit Mehta
author Amit Mehta
author2 Hisamatsu Nakano
Tomoki Abe
Amit Mehta
Junji Yamauchi
format Journal article
container_title IEEE Transactions on Antennas and Propagation
container_volume 71
container_issue 7
container_start_page 5616
publishDate 2023
institution Swansea University
issn 0018-926X
1558-2221
doi_str_mv 10.1109/tap.2023.3267174
publisher Institute of Electrical and Electronics Engineers (IEEE)
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
url http://dx.doi.org/10.1109/tap.2023.3267174
document_store_str 1
active_str 0
description When the circumference of a round metaloop antenna (RoMLA), made of C-type meta-atoms, is one guided wavelength (1λ g ) of the current on the loop, the RoMLA radiates a left-hand CP wave at frequency f N and a right-hand CP wave at frequency f H in the direction normal to the antenna plane. These CP waves have different maximum gains. This paper discusses enhancement in the small gain, not affecting the inherent large gain. Such uncorrelated enhancement in the gain, named the isolated gain enhancement (IsoGE), differs from conventional correlated gain enhancement (non-IsoGE). For IsoGE, a parasitic ring is inserted into the open space of the RoMLA, while maintaining the low-profile RoMLA structure on the order of λ 0 /100 with λ 0 being the free-space operating wavelength. It is found that the ring finally transformed into a round patch is effective for the IsoGE, where the induced current on the patch contributes to increasing the small gain. The analysis, for the first time, shows that the axial ratio and VSWR are, respectively, less than 3 dB and 2 across the 3-dB gain bandwidths around f N and f H , as desired. Furthermore, the insertion of a square parasitic patch within the open space of a square metaloop antenna is also found to be effective for the IsoGE.
published_date 2023-07-01T12:05:52Z
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