Title :
Low-Cost Inkjet-Printed Fully Passive RFID Tags for Calibration-Free Capacitive/Haptic Sensor Applications
Author :
Kim, Sangkil ; Kawahara, Yoshihiro ; Georgiadis, Apostolos ; Collado, Ana ; Tentzeris, Manos M.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A fully passive, compact, and low-cost capacitive wireless radio frequency identification (RFID)-enabled sensing system for capacitive sensing and other Internet of Things applications is proposed. This calibration-free sensor utilizes a dual-tag topology, which consists of two closely spaced RFID tags with dipole antennas and printed capacitive sensor component connected to one of the tags. A series LC resonator is used to both reduce the antenna size and improve the isolation between the two antennas and the design/optimization steps are discussed in detail. All components except for the RFID chips are inkjet printed on an off-the-shelf photopaper using a silver nanoparticle ink. The complete sensor dimension is 84 mm × mm and the sensor is compatible with EPC Class 1 Gen 2 (UHF) standard reader technology at 915 MHz.
Keywords :
Internet of Things; LC circuits; UHF detectors; capacitance measurement; capacitive sensors; dipole antennas; ink jet printing; nanoparticles; nanosensors; paper; radiofrequency identification; resonators; wireless sensor networks; EPC Class 1 Gen 2 UHF standard reader technology; Internet of Things application; calibration-free capacitive-haptic sensor application; capacitive wireless radiofrequency identification sensing system; closely spaced RFID tag; dipole antenna; dual-tag topology; frequency 915 MHz; low-cost inkjet-printed fully passive RFID tag; optimization; photopaper; printed capacitive sensor component; series LC resonator; silver nanoparticle ink; Crosstalk; Dipole antennas; Radiofrequency identification; Resonant frequency; Topology; Capacitive sensing; Capacitive sensing,; Internet of Things (IoT); RFID; RFID-enabled sensor; cross-talk suppression; differential sensing; haptic sensors; inkjet-printing technology; remote sensing; wireless sensors;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2014.2366915
