Low-cost inkjet-printed fully passive RFID tags for calibration-free capacitive/haptic sensor applications

Sangkil Kim, Yoshihiro Kawahara, Apostolos Georgiadis, Ana Collado, Manos M. Tentzeris

    Research output: Contribution to journalArticleScientificpeer-review

    33 Citations (Scopus)


    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.

    Original languageEnglish
    Article number6945328
    Pages (from-to)3135-3145
    Number of pages11
    JournalIEEE Sensors Journal
    Issue number6
    Publication statusPublished - 1 Jun 2015
    Publication typeA1 Journal article-refereed


    • Capacitive sensing
    • cross-talk suppression
    • differential sensing
    • haptic sensors
    • inkjet-printing technology
    • Internet of Things (IoT)
    • remote sensing
    • RFID
    • RFID-enabled sensor
    • wireless sensors

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Instrumentation


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