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Open AccessArticle

Fully-Textile, Wearable Chipless Tags for Identification and Tracking Applications

1
Department of Engineering for Innovation, Complesso Ecotekne-Corpo O, University of Salento, 73100 Lecce, Italy
2
Department of Information Technology and Electrical Engineering, University of Naples Federico II, 80125 Naples, Italy
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in Corchia, L.; De Benedetto, E.; Monti, G.; Cataldo, A.; Angrisani, L.; Arpaia, P.; Tarricone, L. Radio-frequency Identification Based on Textile, Wearable, Chipless Tags for IoT Applications. In Proceedings of 2019 II Workshop on Metrology for Industry 4.0 and IoT (MetroInd4.0&IoT), 4–6 June 2019, Naples, Italy.
Sensors 2020, 20(2), 429; https://doi.org/10.3390/s20020429
Received: 25 November 2019 / Revised: 2 January 2020 / Accepted: 9 January 2020 / Published: 12 January 2020
In this work, two fully-textile wearable devices, to be used as chipless identification tags in identification and tracking applications are presented. For the fabrication of the fully-textile tags, a layer of fleece was used as a substrate, while an adhesive non-woven conductive fabric was employed for the conductive parts. To allow radio-frequency identification of these chipless tags, two alternative techniques were used. One relies on associating a binary code with the resonance frequency of resonant devices: the presence/absence of the resonance peaks in the transmission scattering parameter, | S 21 | , of a set of resonators is used to encode a string of bits. The second technique for accomplishing radio-frequency identification of the chipless tags resorts to a frequency-shift coding technique, which is implemented by modifying the configuration of a hairpin resonator. The obtained numerical and experimental results confirm the suitability of the proposed strategies for obtaining entirely-textile, wearable chipless tags for identification and tracking purposes, which can be particularly useful, especially in the industrial sector. In this field, in fact, the proposed solutions would guarantee a seamless integration with clothes and would facilitate the user’s interaction with the IoT infrastructure. In this regard, one of the envisaged application scenarios related to the tracking of hides in the leather industry is also presented. View Full-Text
Keywords: chipless tag; frequency shift; identification; IoT; microwave resonators; textile; tracking; wearable chipless tag; frequency shift; identification; IoT; microwave resonators; textile; tracking; wearable
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Corchia, L.; Monti, G.; De Benedetto, E.; Cataldo, A.; Angrisani, L.; Arpaia, P.; Tarricone, L. Fully-Textile, Wearable Chipless Tags for Identification and Tracking Applications. Sensors 2020, 20, 429.

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