Near-field chipless-RFID tags with sequential bit reading implemented in plastic substrates
Herrojo, Cristian (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Mata Contreras, Francisco Javier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Paredes, Ferran (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Núñez, Alba (Institut de Microelectrònica de Barcelona)
Ramon, Eloi (Institut de Microelectrònica de Barcelona)
Martín, Ferran, (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Date:	2018
Abstract:	Chipless radiofrequency identification (chipless-RFID) systems based on near-field coupling between the tag and the reader and sequential bit reading, with tags implemented on plastic substrates, are presented in this paper. In the proposed system, the tag is a set of identical resonant elements (S-shaped split ring resonators - S-SRRs), inkjet-printed on a plastic substrate (PEN), forming a resonator chain. The presence or absence of resonant elements at predefined and equidistant positions in the chain determines the logic state '1' and '0', respectively, associated with each resonant element. The reader is a coplanar waveguide (CPW) transmission line fed by a harmonic signal tuned to the resonance frequency of the resonant elements of the chain. Tag reading is achieved by displacing the chain of resonant elements above the CPW transmission line, in close proximity to it, so that near-field coupling between the CPW transmission line and the resonant elements of the tag results. By this means, the injected carrier signal is amplitude modulated, provided the transmission coefficient of the line varies with the presence or absence of resonant elements in the chain, and the identification (ID) code is contained in the envelope function. The functionality of the proposed system, with 10-bit tags occupying an area of 1. 35 cm2 (corresponding to an information density of 7. 4 bit/cm²), is demonstrated.
Grants:	Ministerio de Economía y Competitividad TEC2016-75650-R Ministerio de Economía y Competitividad RTC-2014-2550-7 Ministerio de Economía y Competitividad BES-2014-068164 Ministerio de Economía y Competitividad TEC2013-40600-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014SGR-157
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Published in:	Journal of magnetism and magnetic materials, Vol. 459 (Aug. 2018) , p. 322-327, ISSN 0304-8853

DOI: 10.1016/j.jmmm.2017.10.005

Postprint 11 p, 817.4 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > CIMITEC-UAB
Articles > Research articles
Articles > Published articles