Title: Bidirectional Communication in an HF Hybrid Organic/Solution-Processed Metal-Oxide RFID Tag
Authors: Myny, Kris ×
Rockelé, Maarten
Vaisman Chasin, Adrian Nelson
Pham, D.-V.
Steiger, J.
Botnaras, S.
Weber, D.
Herold, B.
Ficker, J.
Van der Putten, B.
Gelinck, G.
Genoe, Jan
Dehaene, Wim
Heremans, Paul #
Issue Date: 19-Feb-2012
Host Document: 2012 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC) pages:312-313
Conference: ISSCC location:San Francisco, USA date:Feb 19-23, 2012
Abstract: 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 ( >2 um) 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).
Publication status: published
KU Leuven publication type: IC
Appears in Collections:ESAT - MICAS, Microelectronics and Sensors
Electrical Engineering (ESAT) TC, Technology Campus Diepenbeek
Technologiecluster ESAT Elektrotechnische Engineering
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
Myny et al. - 2012 - Bidirectional Communication in an HF Hybrid Organi.pdf Published 431KbAdobe PDFView/Open


All items in Lirias are protected by copyright, with all rights reserved.