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Electronics 2014, 3(3), 491-503; doi:10.3390/electronics3030491

Investigation of a Switchable Textile Communication System on the Human Body

1
Department of Electrical and Electronic Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
2
School of Engineering and Digital Arts, University of Kent, Canterbury, Kent CT2 7NT, UK
*
Author to whom correspondence should be addressed.
Received: 13 February 2014 / Revised: 4 June 2014 / Accepted: 14 July 2014 / Published: 18 August 2014
(This article belongs to the Special Issue Wearable Electronics)
View Full-Text   |   Download PDF [1268 KB, uploaded 18 August 2014]   |  

Abstract

In this paper, a switchable textile communication system working at 2.45 GHz ISM band is presented and studied for different locations within a realistic on-body environment. A 3D laser scanner is used to generate a numerical phantom of the measured subject to improve the accuracy of the simulations which are carried out for different body postures. For the off-body communications, the system is acting as an aperture coupled microstrip patch antenna with a boresight gain of 1.48 dBi. On-body communication is achieved by using a textile stripline, which gives approximately 5 dB transmission loss over 600 mm distance. The system is switched between on and off-body modes by PIN diodes. Common issues, such as shape distortion and body detuning effects which the textile antenna may experience in realistic use are fully discussed. Robust antenna performance is noted in the on-body tests, and an additional 3 dB transmission coefficient deduction was noticed in the most severe shape distortion case. View Full-Text
Keywords: switchable body-centric communication; on-body communication; off-body communication; textile strip patch antenna; textile stripline switchable body-centric communication; on-body communication; off-body communication; textile strip patch antenna; textile stripline
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Bai, Q.; Swaisaenyakorn, S.; Lee, H.-J.; Ford, K.L.; Batchelor, J.C.; Langley, R.J. Investigation of a Switchable Textile Communication System on the Human Body. Electronics 2014, 3, 491-503.

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