A low-profile FSS-based high capacity chipless RFID tag for sensing and encoding applications

Shahid Habib, Amjad Ali, Ghaffer Iqbal Kiani, Wagma Ayub, Syed Muzahir Abbas, Muhammad Fasih Uddin Butt*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


This paper presents a polarization-independent 11-bit chipless RFID tag based on frequency-selective surface which has been designed for encoding and relative humidity (RH) sensing applications. The 10 exterior U-shaped resonators are used for item encoding whereas Kapton has been incorporated with the interior resonator for RH sensing. This radio-frequency identification (RFID) tag operates in S- and C-frequency bands. The proposed design offers enhanced fractional bandwidth up to 88% with the density of 4.46 bits/cm2. Both single- and dual-layer tags have been investigated. The simulated results are in good agreement with measured results and a comparison with existing literature is presented to show the performance. Simple geometry, high code density, large frequency signature bandwidth, high magnitude bit, high radar cross-section, and angular stability for more than 75° are the unique outcomes of the proposed design. In addition, RH sensing has been achieved by integrating the Kapton on the same RFID tag.
Original languageEnglish
Pages (from-to)176-184
Number of pages9
JournalInternational Journal of Microwave and Wireless Technologies
Issue number2
Publication statusPublished - Mar 2022


  • chipless sensor radio-frequency identification
  • frequency selective surfaces
  • item encoding
  • polyamide
  • Kapton
  • relative humidity
  • radar cross section


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