Eco-Friendly Printable Tag For Iot Based Commercial Applications

Abstract

The research presents a new, fully passive, data-dense, and compact 15×15mm2 chipless radio frequency identification (RFID) tag. The proposed design is able of encoding 15-bits information, meaning it is capable of generating 215=32,768 different ID combinations due to which it can be used for tagging numerous items. This tag is able of yielding bit density of 6.67bits/cm2 within a compact area. The advised RFID tag inheres a butterfly-shaped structure comprising fifteen slots/resonators, energized by linearly polarized electromagnetic (EM) waves. Different flexible substrates, i.e., Rogers(RT/duroid®/5880), Kapton® HN, PET, and HP Photo Paper are used for analyzing the tag design and their response as radar cross-section (RCS) is observed. Moreover, this RFID chip is also designed by utilizing silver nanoparticle-based conductive ink on the HP Photo paper substrate due to which the tag behaves as a humidity sensor. Silver nanoparticle-based ink results in easy printing of the tag along with abundantly available paper substrate supports the concept of green electronics. In view of the appealing attributes of the tag like strength, flexibility, simple printing, and need of budget friendly extensible substrates it can be located over rough places to execute sensing.