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.
|Journal||International Journal of Microwave and Wireless Technologies|
|Publication status||E-pub ahead of print - 5 Mar 2021|
Bibliographical notePublisher 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
- relative humidity
- radar cross section