Optically Transparent Flexible Robust Circularly Polarized Antenna for UHF RFID Tags

Abu Sadat Md Sayem, Duc Le, Roy B.V.B. Simorangkir, Toni Björninen, Karu P. Esselle, Raheel M. Hashmi, Maxim Zhadobov

    Research output: Contribution to journalArticleScientificpeer-review

    30 Citations (Scopus)

    Abstract

    Optically transparent flexible tag antennas are highly desired for some applications, where unobtrusiveness and capability of mounting on curved surfaces are required. On the other hand, circular polarization minimizes signal degradation due to polarization mismatch between the reader and tag antennas, thus ensuring good communication quality and accuracy. In this letter, we present an optically transparent and flexible radio frequency identification passive tag antenna operating in the ultrahigh frequency band and exhibits circular polarization. It is thin, lightweight, and completely encapsulated inside transparent polymer, which protects it against dust, water, heat, and mechanical stress. The tag antenna is made by utilizing highly flexible and transparent conductive-mesh-polymer composite through a simple and low-cost manufacturing process. The antenna design is based on a planar square ring. It achieves a measured maximum read range of about 8.3 m and approximately 47 MHz (885-932 MHz) 3 dB axial-ratio bandwidth (ARBW).

    Original languageEnglish
    Pages (from-to)2334-2338
    Number of pages5
    JournalIEEE Antennas and Wireless Propagation Letters
    Volume19
    Issue number12
    DOIs
    Publication statusPublished - 2020
    Publication typeA1 Journal article-refereed

    Keywords

    • Circular polarization
    • flexible
    • polymer composite
    • radio frequency identification (RFID)
    • tag antenna
    • textile
    • ultrahigh frequency (UHF)

    Publication forum classification

    • Publication forum level 2

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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