Increasing the transparency of compact flexible antennas using defected ground structure for unobtrusive wearable technologies

Sayem, ASM; Esselle, KP; Hashmi, RM

Increasing the transparency of compact flexible antennas using defected ground structure for unobtrusive wearable technologies

Sayem, ASM Esselle, KP Hashmi, RM

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Publisher:: INST ENGINEERING TECHNOLOGY-IET
Publication Type:: Journal Article
Citation:: IET Microwaves, Antennas and Propagation, 2020, 14, (14), pp. 1869-1877
Issue Date:: 2020-11-25

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Field	Value	Language
dc.contributor.author	Sayem, ASM
dc.contributor.author	Esselle, KP
dc.contributor.author	Hashmi, RM
dc.date.accessioned	2021-02-14T19:47:55Z
dc.date.available	2021-02-14T19:47:55Z
dc.date.issued	2020-11-25
dc.identifier.citation	IET Microwaves, Antennas and Propagation, 2020, 14, (14), pp. 1869-1877
dc.identifier.issn	1751-8725
dc.identifier.issn	1751-8733
dc.identifier.uri	http://hdl.handle.net/10453/146082
dc.description.abstract	© The Institution of Engineering and Technology 2020 In this paper, new designs of optically transparent wearable antennas have been presented. The explored antennas have the excellent features of high flexibility, small size, low specific absorption rate (SAR) and high optical transparency. The proposed antennas are realised by utilising highly flexible, optically transparent and low-cost materials. For achieving compactness in antenna dimension and for improved transparency, square-ring-shaped radiator is used in the antenna design. To improve the efficiency and gain of the square-ring patch antennas, a new technique is proposed in this paper. The proposed technique utilises a strip line that connects the middle of the two opposite sides of the ring. Full ground plane is used in antenna design to reduce the back radiation. However, full ground plane reduces optical transparency. To elevate optical transparency without affecting antenna's back radiation significantly, a new technique of defected ground structure is investigated in this study. With this defected ground structure, the optical transparency is improved by about 6% without significantly compromising the SAR. The compatibility of the proposed antennas for wearable applications are investigated by examining the performances on flat and bent phantoms. Moreover, the robustness of the antennas are studied by subjecting the prototypes to multiple bending operations.
dc.language	English
dc.publisher	INST ENGINEERING TECHNOLOGY-IET
dc.relation.ispartof	IET Microwaves, Antennas and Propagation
dc.relation.isbasedon	10.1049/iet-map.2020.0495
dc.rights	info:eu-repo/semantics/closedAccess
dc.rights	This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antennas and Propagation and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library.	en_US
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.title	Increasing the transparency of compact flexible antennas using defected ground structure for unobtrusive wearable technologies
dc.type	Journal Article
utslib.citation.volume	14
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	1005 Communications Technologies
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
utslib.copyright.status	closed_access	*
dc.date.updated	2021-02-14T19:47:33Z
pubs.issue	14
pubs.publication-status	Published
pubs.volume	14
utslib.citation.issue	14

Abstract:

© The Institution of Engineering and Technology 2020 In this paper, new designs of optically transparent wearable antennas have been presented. The explored antennas have the excellent features of high flexibility, small size, low specific absorption rate (SAR) and high optical transparency. The proposed antennas are realised by utilising highly flexible, optically transparent and low-cost materials. For achieving compactness in antenna dimension and for improved transparency, square-ring-shaped radiator is used in the antenna design. To improve the efficiency and gain of the square-ring patch antennas, a new technique is proposed in this paper. The proposed technique utilises a strip line that connects the middle of the two opposite sides of the ring. Full ground plane is used in antenna design to reduce the back radiation. However, full ground plane reduces optical transparency. To elevate optical transparency without affecting antenna's back radiation significantly, a new technique of defected ground structure is investigated in this study. With this defected ground structure, the optical transparency is improved by about 6% without significantly compromising the SAR. The compatibility of the proposed antennas for wearable applications are investigated by examining the performances on flat and bent phantoms. Moreover, the robustness of the antennas are studied by subjecting the prototypes to multiple bending operations.

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http://hdl.handle.net/10453/146082