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 × 20mm(2). 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.