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


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
JournalInternational Journal of Microwave and Wireless Technologies
Publication statusE-pub ahead of print - 5 Mar 2021

Bibliographical note

Publisher Copyright:
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association.

Copyright 2021 Elsevier B.V., All rights reserved.


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

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