Low-cost inkjet-printed fully passive RFID tags for calibration-free capacitive/haptic sensor applications
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||11|
|Journal||IEEE Sensors Journal|
|Publication status||Published - 1 Jun 2015|
|Publication type||A1 Journal article-refereed|
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 84mm × 95mm and the sensor is compatible with EPC Class 1 Gen 2 (UHF) standard reader technology at 915 MHz.