A Wideband Circularly Polarized Vivaldi Array Antenna with Axial Ratio Enhancement

Wang, M; Li, X; Luo, W; Chen, H; Chen, S-L

A Wideband Circularly Polarized Vivaldi Array Antenna with Axial Ratio Enhancement

Wang, M Li, X Luo, W Chen, H Chen, S-L

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Publisher:: IEEE
Publication Type:: Conference Proceeding
Citation:: 2024 Photonics & Electromagnetics Research Symposium (PIERS), 2024, 00, pp. 1-5
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Wang, M
dc.contributor.author	Li, X
dc.contributor.author	Luo, W
dc.contributor.author	Chen, H
dc.contributor.author	Chen, S-L
dc.date	2024-04-21
dc.date.accessioned	2025-02-26T21:07:03Z
dc.date.available	2025-02-26T21:07:03Z
dc.date.issued	2024-01-01
dc.identifier.citation	2024 Photonics & Electromagnetics Research Symposium (PIERS), 2024, 00, pp. 1-5
dc.identifier.isbn	979-8-3503-7591-6
dc.identifier.issn	2831-5790
dc.identifier.uri	http://hdl.handle.net/10453/185350
dc.description.abstract	This manuscript describes a wideband circularly polarized Vivaldi array antenna for axial ratio enhancement It consists of four Vivaldi antenna elements arranged in a cross shaped structure and a 1 to 4 feeding network providing unequal phases The element is composed of a fan shaped microwave line for feeding on the bottom and a radiator with a palm leaf shape on the top Its simulated impendence bandwidth reaches 29 3 while the gain is 7 1dBi at 5 8GHz The feeding network is designed as two 90 phase shifters connected by a 1 to 2 power divider The two phase shifters are symmetrical along the center It allows to provide 0 90 0 and 90 transmission phases in a counterclockwise direction The four Vivaldi antenna elements are connected with the feeding network by using coaxial line Thanks for the symmetry of the feeding network the magnitudes in both directions of the cross shaped structure are equal To achieve the circularly polarized wave the fan shaped microwave lines utilize current reversal to get 0 0 180 and 180 transmission phases in a counterclockwise direction Then the designed antenna achieves 0 90 180 and 270 transmission phases in a counterclockwise direction allowing to realize circularly polarized wave with low axial ratio and wide bandwidth The simulated results shows that the proposed four element array obtains a gain of 9 6dBi at 5 8GHz while the axial ratio is only 1 3dB The impendence bandwidth reaches 32 8 while the 1 dB gain bandwidth is over 29 8 In addition the proposed antenna obtains a 27 6 bandwidth for 3 dB axial ratio These results indicate that the presented Vivaldi array antenna has good performance on low axial ratio and wide bandwidth
dc.language	en
dc.publisher	IEEE
dc.relation.ispartof	2024 Photonics & Electromagnetics Research Symposium (PIERS)
dc.relation.ispartof	2024 Photonics and Electromagnetics Research Symposium
dc.relation.isbasedon	10.1109/piers62282.2024.10618881
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	A Wideband Circularly Polarized Vivaldi Array Antenna with Axial Ratio Enhancement
dc.type	Conference Proceeding
utslib.citation.volume	00
utslib.location.activity	Chengdu, China
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Global Big Data Technologies Centre (GBDTC)
utslib.copyright.status	closed_access	*
dc.date.updated	2025-02-26T21:07:01Z
pubs.finish-date	2024-04-25
pubs.place-of-publication	Piscataway, USA
pubs.publication-status	Published
pubs.start-date	2024-04-21
pubs.volume	00
dc.location	Piscataway, USA

Abstract:

This manuscript describes a wideband circularly polarized Vivaldi array antenna for axial ratio enhancement It consists of four Vivaldi antenna elements arranged in a cross shaped structure and a 1 to 4 feeding network providing unequal phases The element is composed of a fan shaped microwave line for feeding on the bottom and a radiator with a palm leaf shape on the top Its simulated impendence bandwidth reaches 29 3 while the gain is 7 1dBi at 5 8GHz The feeding network is designed as two 90 phase shifters connected by a 1 to 2 power divider The two phase shifters are symmetrical along the center It allows to provide 0 90 0 and 90 transmission phases in a counterclockwise direction The four Vivaldi antenna elements are connected with the feeding network by using coaxial line Thanks for the symmetry of the feeding network the magnitudes in both directions of the cross shaped structure are equal To achieve the circularly polarized wave the fan shaped microwave lines utilize current reversal to get 0 0 180 and 180 transmission phases in a counterclockwise direction Then the designed antenna achieves 0 90 180 and 270 transmission phases in a counterclockwise direction allowing to realize circularly polarized wave with low axial ratio and wide bandwidth The simulated results shows that the proposed four element array obtains a gain of 9 6dBi at 5 8GHz while the axial ratio is only 1 3dB The impendence bandwidth reaches 32 8 while the 1 dB gain bandwidth is over 29 8 In addition the proposed antenna obtains a 27 6 bandwidth for 3 dB axial ratio These results indicate that the presented Vivaldi array antenna has good performance on low axial ratio and wide bandwidth

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http://hdl.handle.net/10453/185350