Axial ratio beamwidth enhancement of a low-profile circularly polarized antenna using defected ground structures

Ray, MK; Mandal, K; Moloudian, G; Lalbakhsh, A

Axial ratio beamwidth enhancement of a low-profile circularly polarized antenna using defected ground structures

Ray, MK Mandal, K Moloudian, G Lalbakhsh, A

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Publisher:: Cambridge University Press (CUP)
Publication Type:: Journal Article
Citation:: International Journal of Microwave and Wireless Technologies, 2023, 100, (8), pp. 1434-1442
Issue Date:: 2023-03-23

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Field	Value	Language
dc.contributor.author	Ray, MK
dc.contributor.author	Mandal, K
dc.contributor.author	Moloudian, G
dc.contributor.author	Lalbakhsh, A
dc.date.accessioned	2024-04-16T22:29:16Z
dc.date.available	2024-04-16T22:29:16Z
dc.date.issued	2023-03-23
dc.identifier.citation	International Journal of Microwave and Wireless Technologies, 2023, 100, (8), pp. 1434-1442
dc.identifier.issn	1759-0787
dc.identifier.issn	1759-0795
dc.identifier.uri	http://hdl.handle.net/10453/177987
dc.description.abstract	This article explores the possibilities of incorporating a defected ground structure (DGS) for widening the 3 dB axial ratio beamwidth (ARBW) of a simple low-profile planar circularly polarized (CP) antenna. Two pairs of DGSs are etched symmetrically along the diagonals of the ground plane to overcome the limited 3 dB ARBW performance of a crossed-slotted circular-shaped planar CP antenna. Here, one pair of DGSs is orthogonal to another pair of DGSs. The distance between the pairs of DGSs plays a key role in enhancing the 3 dB ARBW by 40.62%. A gap of 0.18λ0 is considered between the DGSs to maintain the symmetrical electric field distribution in the substrate. It also helps to reduce orthogonal current components and provides uniformly distributed patch surface currents. These phenomena collectively help the proposed CP antenna to exhibit right-handed circular polarization radiation with the 3 dB ARBW of 186° and 188° in the E-plane and H-plane, respectively. The measured results yield impedance bandwidth (S11 ≤ -10 dB) of 2.6% (2.283-2.342 GHz), CP bandwidth of 0.9% (2.294-2.315 GHz), gain higher than 4.8 dBic, and total antenna efficiency more than 64% across the entire CP band.
dc.language	en
dc.publisher	Cambridge University Press (CUP)
dc.relation.ispartof	International Journal of Microwave and Wireless Technologies
dc.relation.isbasedon	10.1017/S1759078723000168
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	4006 Communications engineering
dc.subject.classification	4008 Electrical engineering
dc.subject.classification	4009 Electronics, sensors and digital hardware
dc.title	Axial ratio beamwidth enhancement of a low-profile circularly polarized antenna using defected ground structures
dc.type	Journal Article
utslib.citation.volume	100
utslib.for	0906 Electrical and Electronic Engineering
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
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-16T22:29:14Z
pubs.issue	8
pubs.publication-status	Published
pubs.volume	100
utslib.citation.issue	8

Abstract:

This article explores the possibilities of incorporating a defected ground structure (DGS) for widening the 3 dB axial ratio beamwidth (ARBW) of a simple low-profile planar circularly polarized (CP) antenna. Two pairs of DGSs are etched symmetrically along the diagonals of the ground plane to overcome the limited 3 dB ARBW performance of a crossed-slotted circular-shaped planar CP antenna. Here, one pair of DGSs is orthogonal to another pair of DGSs. The distance between the pairs of DGSs plays a key role in enhancing the 3 dB ARBW by 40.62%. A gap of 0.18λ0 is considered between the DGSs to maintain the symmetrical electric field distribution in the substrate. It also helps to reduce orthogonal current components and provides uniformly distributed patch surface currents. These phenomena collectively help the proposed CP antenna to exhibit right-handed circular polarization radiation with the 3 dB ARBW of 186° and 188° in the E-plane and H-plane, respectively. The measured results yield impedance bandwidth (S11 ≤ -10 dB) of 2.6% (2.283-2.342 GHz), CP bandwidth of 0.9% (2.294-2.315 GHz), gain higher than 4.8 dBic, and total antenna efficiency more than 64% across the entire CP band.

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http://hdl.handle.net/10453/177987