1. A Fully Inkjet-Printed Wireless and Chipless Sensor for CO2 and
Temperature Detection
Abstract:
A study on a low-cost wireless fully inkjet-printed chipless sensor on a
flexible laminate with three different inks is presented. It is based on two
split ring resonator 90° oriented between each other to allow for
independent responses on two polarizations. A deposit of a polymer/single
walled carbon nanotube composite ink is used to allow for the detection of
CO2 as well as temperature. In this paper, it is shown that the inkjet
printing of a polymer-based coating on top of the sensing/reactive deposit
can significantly reduce the sensitivity to CO2, whereas the temperature
sensitivity stays at same. Simulations and experimental results verify the
repeatability of this topology.