A Watch Strap Antenna for the Applications of Wearable Systems

Gaosheng Li; Gui Gao; Jianhui Bao; Bo Yi; Chaoyun Song; Li-an Bian

doi:10.1109/ACCESS.2017.2715186

IEEE Access (Jan 2017)

A Watch Strap Antenna for the Applications of Wearable Systems

Gaosheng Li,
Gui Gao,
Jianhui Bao,
Bo Yi,
Chaoyun Song,
Li-an Bian

Affiliations

Gaosheng Li: ORCiD; College of Electronic Science and Engineering, National University of Defense Technology, Changsha, China
Gui Gao: College of Electronic Science and Engineering, National University of Defense Technology, Changsha, China
Jianhui Bao: School of Electronic and Information Engineering, Hebei University of Technology, Tianjin, China
Bo Yi: College of Electronic Science and Engineering, National University of Defense Technology, Changsha, China
Chaoyun Song: Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.K.
Li-an Bian: College of Electronic Science and Engineering, National University of Defense Technology, Changsha, China

DOI: https://doi.org/10.1109/ACCESS.2017.2715186
Journal volume & issue: Vol. 5
pp. 10332 – 10338

Abstract

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A wearable antenna based on the metal watch strap is proposed. A prototype of a TISSOT classic watch is used for the demonstration. The width of the strap has only a little impact on the radiation patterns. However, the variations of the feeding location would dramatically influence the resonance frequency and the matching performance. The shapes and the graphic patterns of the wristband have contributions on the reflection coefficients as well as the radiation patterns. A fractional bandwidth of 77.8% could be obtained when feeding to the right of the dial at 2.46 GHz, which falls into the ISM (industrial, scientific, and medical) band. The main lobe is fairly wide in both E- and H-planes, which would enable the strap antenna to have a good adaptation for the various postures of the arm. The measurement results show good agreement with that of the simulations, which indicates it a potential option for the applications of wearable systems.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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