Radio-frequency Identification Based on Textile, Wearable, Chipless Tags for IoT Applications

In this work, two solutions for the design and fabrication of fully-textile chipless tags are presented. The first relies on associating the data with the resonance frequency of resonant devices: the presence/absence of the resonance peaks in the |S
₂₁
| of a set of resonators are used to encode a string of bits. The second solution resorts to a frequency-shift coding technique and on the use of a hairpin resonator. Numerical and experimental results demonstrate the reliability of the proposed solutions. The final goal is to develop wearable, chipless electronics that could be used, for example, in radio-frequency identification or sensing in industrial IoT applications.