A fully inkjet printed wireless and chipless sensor for co2 and temperature detection

A fully inkjet-printed wireless chipless sensor is presented that uses split ring resonators printed with three different inks to independently detect CO2 and temperature through polarization responses. A polymer/carbon nanotube composite ink detects both CO2 and temperature, while an additional polymer coating is shown to reduce CO2 sensitivity without affecting temperature detection. Simulations and experiments validate the repeatability of the sensor's design and functionality.