TY - JOUR
T1 - A chipless RFID sensor system for cyber centric monitoring applications
AU - Shrestha, Sudhir
AU - Balachandran, Mercyma
AU - Agarwal, Mangilal
AU - Phoha, Vir V.
AU - Varahramyan, Kody
N1 - Funding Information:
Manuscript received May 06, 2008. First published March 27, 2009; current version published May 06, 2009. This work was supported by the Louisiana Board of Regents under P-KSFI Grant LEQSF (2007-12)-ENH-PKSFI-PRS-03.
PY - 2009/5
Y1 - 2009/5
N2 - A chipless RF identifiction (RFID) sensor system platform consisting of passive chipless RFID sensor tags and specialized reader has been developed for cyber centric monitoring applications. The sensor tags are fabricated on a flexible substrate, and the tag identification (ID) generation circuit consists of microstrip transmission lines. Two tag configurations are presented. The first configuration (conf-I) consists of an antenna and an integrated sensor. The second configuration (conf-II) consists of an antenna, ID generation circuit, and a sensor. The specialized reader system, consisting of an analog reader section and an on-board computer system, communicates with the sensor tags using load modulated backscattered communication techniques, at 915-MHz carrier signal. The reader, receiving the ID code generated by a tag, constructs it into a standardized RFID data frame, suitable for cyberspace information exchange. The developed system has been tested for wireless monitoring of ethylene gas. Using a conf-I tag, demodulated voltage change of 3.05 mV is observed at the reader, when the ethylene gas concentration changes from 0 to 100 ppm. The presented conf-II tag prototype allows generation of eight different ID codes and an average of 26.51°/pF phase change in the backscattered signal, when the load capacitance (sensor) of the tag changes between 1-5 pF.
AB - A chipless RF identifiction (RFID) sensor system platform consisting of passive chipless RFID sensor tags and specialized reader has been developed for cyber centric monitoring applications. The sensor tags are fabricated on a flexible substrate, and the tag identification (ID) generation circuit consists of microstrip transmission lines. Two tag configurations are presented. The first configuration (conf-I) consists of an antenna and an integrated sensor. The second configuration (conf-II) consists of an antenna, ID generation circuit, and a sensor. The specialized reader system, consisting of an analog reader section and an on-board computer system, communicates with the sensor tags using load modulated backscattered communication techniques, at 915-MHz carrier signal. The reader, receiving the ID code generated by a tag, constructs it into a standardized RFID data frame, suitable for cyberspace information exchange. The developed system has been tested for wireless monitoring of ethylene gas. Using a conf-I tag, demodulated voltage change of 3.05 mV is observed at the reader, when the ethylene gas concentration changes from 0 to 100 ppm. The presented conf-II tag prototype allows generation of eight different ID codes and an average of 26.51°/pF phase change in the backscattered signal, when the load capacitance (sensor) of the tag changes between 1-5 pF.
KW - Chipless RF identification (RFID) sensor system
KW - Cyber centric monitoring
KW - Passive tags
KW - RFID reader
KW - Transmission line identification (ID) generation
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U2 - 10.1109/TMTT.2009.2017298
DO - 10.1109/TMTT.2009.2017298
M3 - Article
AN - SCOPUS:67649248953
SN - 0018-9480
VL - 57
SP - 1303
EP - 1309
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 5
M1 - 4806180
ER -