NDLI: A capacitive touch interface for passive RFID tags

Content Provider	IEEE Xplore Digital Library
Author	Sample, A.P. Yeager, D.J. Smith, J.R.
Copyright Year	2009
Description	Author affiliation: University of Washington, Department of Electrical Engineering, Campus Box 352500, Seattle, 98195-2500 USA (Sample, A.P.; Yeager, D.J.) \|\| Intel Research Seattle, 1100 NE 45th Street, 6th Floor, WA 98105 USA (Smith, J.R.)
Abstract	This paper presents a novel method for incorporating a capacitive touch interface into existing passive RFID tag architectures without additional parts or changes to the manufacturing process. Our approach employs the tag's antenna as a dual function element in which the antenna simultaneously acts as both a low-frequency capacitive fringing electric field sensor and also as an RF antenna. To demonstrate the feasibility of our approach, we have prototyped a passive UHF tag with capacitive sensing capability integrated into the antenna port using the WISP tag. Finally, we describe how this technology can be used for touch interfaces as well as other applications with the addition of a LED for user feedback.
Starting Page	103
Ending Page	109
File Size	821664
Page Count	7
File Format	PDF
ISBN	9781424433377
DOI	10.1109/RFID.2009.4911212
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Costs Active RFID tags Switches Credit cards Capacitive sensors Passive RFID Passive RFID tags RFID tags touch interface capacitive sensor Manufacturing processes transponder UHF antennas Radiofrequency identification
Content Type	Text
Resource Type	Article

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