Small On-Metal UHF RFID Transponder With Long Read Range

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    42 Citations (Scopus)


    A new small on-metal UHF Radio Frequency Identification (RFID) transponder, 18 mm * 4 mm * 2 mm in size, is presented. The read range of the transponder has been optimized by using the most efficient radiator within the given maximum dimensions and even more importantly, by conjugate impedance matching between the small antenna and the microchip, which has been achieved by using antenna-integrated components. As a commercially viable solution is targeted, the bandwidth and the sensitivity of the antenna to the dimensional variation of the fabrication process have been studied and solutions for improved robustness are presented. After the study and optimization of the transponder, a series of prototypes was fabricated on printed circuit board. The measurement results of the prototypes showed good consistency with the simulations and a read range of 3.0 m was measured for a prototype mounted on a metal plate.
    Original languageEnglish
    Pages (from-to)4859-4867
    JournalIEEE Transactions on Antennas and Propagation
    Issue number11
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed


    • item-level tagging
    • on-metal transponder
    • PCB antennas
    • small antennas
    • small transponder
    • UHF RFID
    • OtaNano


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