Chipless RFID Label with Identification and Touch-Sensing Capabilities

This article presents a 14-bit chipless RFID label which, in addition to classical identification feature, can be used as decimal numeric keypad, allowing the deployment of secure access control applications. A low-cost single layer label comprising 10 RF loop scatterers is used to code information...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 21; no. 14; p. 4862
Main Authors Unnikrishnan, Rahul, Rance, Olivier, Barbot, Nicolas, Perret, Etienne
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 16.07.2021
MDPI
Subjects
Access control
back scattering
chipless RFID
Design
Electronics
Engineering Sciences
gesture recognition
Low cost
Microstrip antennas
Performance evaluation
Radio frequency identification
Reading
Resonators
Sensors
gesture recognition
chipless RFID
back scattering
chipless RFID back scattering gesture recognition
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Summary:This article presents a 14-bit chipless RFID label which, in addition to classical identification feature, can be used as decimal numeric keypad, allowing the deployment of secure access control applications. A low-cost single layer label comprising 10 RF loop scatterers is used to code information in the frequency domain. In addition, each resonator is associated to a digit in the decimal number system, and the difference in the spectrum caused by the touch event is exploited for the detection of each key pressing. The shape of the resonators has been carefully selected to be both highly resonant and to show high sensitivity to the presence or absence of the human finger. The concept is validated by measurements in an office environment using an FCC compliant low-cost chipless reader and microstrip vivaldi antennas. Simple detection algorithms are proposed for both identification and touch sensing in real environment.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s21144862