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

Published online by Cambridge University Press:  25 March 2021

Shahid Habib
Affiliation:
Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan
Amjad Ali
Affiliation:
Department of Electrical and Electronics Engineering, University of Nottingham, Nottingham, UK
Ghaffer Iqbal Kiani
Affiliation:
Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
Wagma Ayub
Affiliation:
School of Chemistry, University of Nottingham, Nottingham, UK
Syed Muzahir Abbas
Affiliation:
School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, Australia
Muhammad Fasih Uddin Butt*
Affiliation:
Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan School of Electronics and Computer Science, University of Southampton, Southampton, UK
*
Author for correspondence: Muhammad Fasih Uddin Butt, Email: fasih@comsats.edu.pk

Abstract

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.

Information

Type
RFID and Sensors
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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