A PDMS/MWCNTs RFID flexible tag with advanced resonator design for read range enhancement in IoT monitoring systems

Hafsa Anam; Syed Muzahir Abbas; Iain B. Collings; Subhas Mukhopadhyay

doi:10.1038/s41598-025-86773-7

A PDMS/MWCNTs RFID flexible tag with advanced resonator design for read range enhancement in IoT monitoring systems

Hafsa Anam^*, Syed Muzahir Abbas, Iain B. Collings, Subhas Mukhopadhyay

^*Corresponding author for this work

School of Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

2 Downloads (Pure)

Abstract

Low-cost and passive identification systems are necessary for real time IoT (internet of things) monitoring. The paper presents a novel designed chipless RFID tag towards read range enhancement of (2.70 mm). A novel approach of array-based resonators towards real time read range enhancement is proposed in this research work with efficient performance. A mould-based solution casting technique is used for chipless tag fabrication. Multi-Walled Carbon Nanotubes (MWCNTs) are used as electrodes with flexible Polydimethylsiloxane (PDMS) substrate. The developed battery-free tag can encode 3-bits data while staying in compact dimensions of 20 × 20mm². The single unit tag is extended to 3 × 3-array structure. The novel approach leads the tag towards RCS increment of 25.17dBsm. The tag has been extended to 5 × 5-array for Poly-ethylene terephthalate (PET) substrate with silver nanoparticle-based ink radiator leading to RCS increment of 25.16dBsm. The tags read range performance is very highly reliable and stable as measured from multiple samples and is suitable for deployment in a smart sensing and IoT identification network.

Original language	English
Article number	9686
Pages (from-to)	1-23
Number of pages	23
Journal	Scientific Reports
Volume	15
DOIs	https://doi.org/10.1038/s41598-025-86773-7
Publication status	Published - 2025

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Copyright the Author(s) 2025. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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Publisher version (open access)Final published version, 6.58 MBLicence: CC BY

Cite this

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title = "A PDMS/MWCNTs RFID flexible tag with advanced resonator design for read range enhancement in IoT monitoring systems",

abstract = "Low-cost and passive identification systems are necessary for real time IoT (internet of things) monitoring. The paper presents a novel designed chipless RFID tag towards read range enhancement of (2.70 mm). A novel approach of array-based resonators towards real time read range enhancement is proposed in this research work with efficient performance. A mould-based solution casting technique is used for chipless tag fabrication. Multi-Walled Carbon Nanotubes (MWCNTs) are used as electrodes with flexible Polydimethylsiloxane (PDMS) substrate. The developed battery-free tag can encode 3-bits data while staying in compact dimensions of 20 × 20mm2. The single unit tag is extended to 3 × 3-array structure. The novel approach leads the tag towards RCS increment of 25.17dBsm. The tag has been extended to 5 × 5-array for Poly-ethylene terephthalate (PET) substrate with silver nanoparticle-based ink radiator leading to RCS increment of 25.16dBsm. The tags read range performance is very highly reliable and stable as measured from multiple samples and is suitable for deployment in a smart sensing and IoT identification network.",

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AU - Mukhopadhyay, Subhas

N1 - Copyright the Author(s) 2025. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2025

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N2 - Low-cost and passive identification systems are necessary for real time IoT (internet of things) monitoring. The paper presents a novel designed chipless RFID tag towards read range enhancement of (2.70 mm). A novel approach of array-based resonators towards real time read range enhancement is proposed in this research work with efficient performance. A mould-based solution casting technique is used for chipless tag fabrication. Multi-Walled Carbon Nanotubes (MWCNTs) are used as electrodes with flexible Polydimethylsiloxane (PDMS) substrate. The developed battery-free tag can encode 3-bits data while staying in compact dimensions of 20 × 20mm2. The single unit tag is extended to 3 × 3-array structure. The novel approach leads the tag towards RCS increment of 25.17dBsm. The tag has been extended to 5 × 5-array for Poly-ethylene terephthalate (PET) substrate with silver nanoparticle-based ink radiator leading to RCS increment of 25.16dBsm. The tags read range performance is very highly reliable and stable as measured from multiple samples and is suitable for deployment in a smart sensing and IoT identification network.

AB - Low-cost and passive identification systems are necessary for real time IoT (internet of things) monitoring. The paper presents a novel designed chipless RFID tag towards read range enhancement of (2.70 mm). A novel approach of array-based resonators towards real time read range enhancement is proposed in this research work with efficient performance. A mould-based solution casting technique is used for chipless tag fabrication. Multi-Walled Carbon Nanotubes (MWCNTs) are used as electrodes with flexible Polydimethylsiloxane (PDMS) substrate. The developed battery-free tag can encode 3-bits data while staying in compact dimensions of 20 × 20mm2. The single unit tag is extended to 3 × 3-array structure. The novel approach leads the tag towards RCS increment of 25.17dBsm. The tag has been extended to 5 × 5-array for Poly-ethylene terephthalate (PET) substrate with silver nanoparticle-based ink radiator leading to RCS increment of 25.16dBsm. The tags read range performance is very highly reliable and stable as measured from multiple samples and is suitable for deployment in a smart sensing and IoT identification network.

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A PDMS/MWCNTs RFID flexible tag with advanced resonator design for read range enhancement in IoT monitoring systems

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