Bidirectional communication in an HF hybrid organic/solution-processed metal-oxide RFID tag

Kris Myny, Maarten Rockelé, Adrian Chasin, Duy Vu Pham, Jurgen Steiger, Silviu Botnaras, Dennis Weber, Bernhard Herold, Jurgen Ficker, Bas Van Der Putten, Gerwin Gelinck, Jan Genoe, Wim Dehaene, Paul Heremans

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

29 Citaten (Scopus)


The ambition of printing item-level RFID tags is one of the driving forces behind printed electronics research. Organic RFID tags have been shown, initially using p-type organic semiconductors [1-4]. The introduction of n-type organic semiconductors with reasonable performance made organic CMOS conceivable [5] and organic CMOS RFID tags were shown [6]. However, all currently reported organic RFID tags are based on a tag-talks-first principle: as soon as the tag gets powered from the RF field, its code is transmitted at a data rate determined by an internal ring oscillator. Practical RFID systems will need to be able to read multiple RFID tags within the reach of the reader antenna. Existing anti-collision protocols implemented in organic RFID tags [2,4] are limited to about maximum 4 tags and come at the cost of a slow reading time. In this paper, we for the first time realize a reader-talks-first low-temperature thin-film transistor (TFT) RFID circuit. We use a complementary hybrid organic/oxide technology. As organic transistors with reasonable channel lengths (≥2μm) have a cut-off frequency below 13.56MHz, the base carrier frequency of HF communication, present technologies on foil do not yet allow to extract the circuit clock as a fraction of the base carrier. We solve this by introducing an original uplink (reader-to-tag) scheme, in which a slow clock (compatible with our transistors' speed) is transmitted as amplitude-modulation on the base carrier while data is encoded on this clock by pulse width modulation (PWM).

Originele taal-2Engels
Titel2012 IEEE International Solid-State Circuits Conference, ISSCC 2012 - Digest of Technical Papers
Aantal pagina's3
StatusGepubliceerd - 11 mei 2012
Evenement59th International Solid-State Circuits Conference, ISSCC 2012 - San Francisco, CA, Verenigde Staten van Amerika
Duur: 19 feb 201223 feb 2012
Congresnummer: 59


Congres59th International Solid-State Circuits Conference, ISSCC 2012
Verkorte titelISSCC 2012
Land/RegioVerenigde Staten van Amerika
StadSan Francisco, CA
AnderIEEE International Solid-State Circuits Conference (ISSCC 2012)


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