Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

A Group-Delay-Based Chipless RFID Humidity Tag Sensor Using Silicon Nanowires

Abstract : This letter proposes, for the first time, a wireless passive chipless RFID tag for identification and humidity sensing applications. The proposed sensor tag, based on time domain, consists of cascaded group of transmission-line sections (C-sections) coupled at alternative ends capable of producing group delay peaks at a particular frequency. C-sections allow producing a unique ID for a tag. Sensing is achieved by depositing silicon nanowires on the strips of the C-sections group. Silicon nanowires are very sensitive to environmental humidity variation, which in turn changes the radar cross section (RCS), phase, and group delay of the tag. This feature is utilized for humidity sensor applications. The proposed sensor tag is experimentally verified. An RCS change of 30 dB and group delay variation of nearly 22.3 ns was observed near the fundamental frequency over a bandwidth of 40 MHz for a relative humidity variation of 60.2%-88%. Measurements were performed in a real environment. The obtained results confirm the very good potential of nanowires in humidity sensor applications.
Document type :
Journal articles
Complete list of metadata
Contributor : Valence Lcis Connect in order to contact the contributor
Submitted on : Friday, July 11, 2014 - 3:12:29 PM
Last modification on : Wednesday, November 10, 2021 - 2:54:03 PM





Raji Sasidharan Nair, Etienne Perret, Smail Tedjini, T. Baron. A Group-Delay-Based Chipless RFID Humidity Tag Sensor Using Silicon Nanowires. IEEE Antennas and Wireless Propagation Letters, Institute of Electrical and Electronics Engineers, 2013, 12, pp.729-732. ⟨10.1109/lawp.2013.2270929⟩. ⟨hal-01023132⟩



Record views