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Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current

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

IEEE Antennas and Wireless Propagation Letters, Pages: 1 - 5

Swansea University Author: Amit Mehta Orcid Logo

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DOI (Published version): 10.1109/lawp.2023.3319948

Abstract

The quality of the radiation field from a square loop antenna is evaluated using ARz, the axial ratio on the z-axis normal to the loop plane. For this evaluation, a generalized antenna model is used, where the current on a loop that is one guided wavelength in length is assumed to travel only in the...

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Published in: IEEE Antennas and Wireless Propagation Letters
ISSN: 1536-1225 1548-5757
Published: Institute of Electrical and Electronics Engineers (IEEE) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa64768
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first_indexed 2023-10-18T09:49:09Z
last_indexed 2023-10-18T09:49:09Z
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spelling v2 64768 2023-10-18 Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current 8a1e5679707cf437cbfd17b72514b8a5 0000-0001-8073-2436 Amit Mehta Amit Mehta true false 2023-10-18 EEEG The quality of the radiation field from a square loop antenna is evaluated using ARz, the axial ratio on the z-axis normal to the loop plane. For this evaluation, a generalized antenna model is used, where the current on a loop that is one guided wavelength in length is assumed to travel only in the forward direction, without backward currents. Firstly, the radiation field is formulated for the situation where the traveling wave current decays with attenuation constant α . It is found that ARz exponentially degrades as α increases. Secondly, a reactive current of weight q is superimposed onto the original current used for the first derivation. It is revealed that the degraded ARz is remarkably improved by the superimposed current. Throughout this discussion the difference in the axial ratios of the square and round loop antenna models is clarified. Journal Article IEEE Antennas and Wireless Propagation Letters 1 5 Institute of Electrical and Electronics Engineers (IEEE) 1536-1225 1548-5757 Axial ratio, circularly polarized radiation, square loop 27 9 2023 2023-09-27 10.1109/lawp.2023.3319948 http://dx.doi.org/10.1109/lawp.2023.3319948 H. Nakano, T. Abe, A. Mehta and J. Yamauchi, "Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current," in IEEE Antennas and Wireless Propagation Letters, doi: 10.1109/LAWP.2023.3319948. COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University 2023-11-30T15:23:43.5458411 2023-10-18T10:29:57.3705942 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 64768__28812__8b0f5c77d1634c198d6383dac1910922.pdf 64768.pdf 2023-10-18T10:48:51.1729701 Output 475139 application/pdf Accepted Manuscript true true eng
title Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current
spellingShingle Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current
Amit Mehta
title_short Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current
title_full Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current
title_fullStr Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current
title_full_unstemmed Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current
title_sort Discussion of the Axial Ratio of a Square Loop Antenna with an Attenuating Current
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 Antennas and Wireless Propagation Letters
container_start_page 1
publishDate 2023
institution Swansea University
issn 1536-1225
1548-5757
doi_str_mv 10.1109/lawp.2023.3319948
publisher Institute of Electrical and Electronics Engineers (IEEE)
college_str Faculty of Science and Engineering
hierarchytype
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/lawp.2023.3319948
document_store_str 1
active_str 0
description The quality of the radiation field from a square loop antenna is evaluated using ARz, the axial ratio on the z-axis normal to the loop plane. For this evaluation, a generalized antenna model is used, where the current on a loop that is one guided wavelength in length is assumed to travel only in the forward direction, without backward currents. Firstly, the radiation field is formulated for the situation where the traveling wave current decays with attenuation constant α . It is found that ARz exponentially degrades as α increases. Secondly, a reactive current of weight q is superimposed onto the original current used for the first derivation. It is revealed that the degraded ARz is remarkably improved by the superimposed current. Throughout this discussion the difference in the axial ratios of the square and round loop antenna models is clarified.
published_date 2023-09-27T15:23:44Z
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score 11.03559

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