A humidity sensor based on frequency-domain microwave chipless technology is studied and experimentally characterized in this paper. The chipless microwave sensor is composed of a microwave resonator coupled with a 50 Ohm microstrip transmission line, covered with a 180 μm-thick Nafion layer, which acts as sensitive material. The response of the sensor at 25 °C and for a relative humidity (RH) variation in the range of 0–40% has been experimentally assessed. The sensor shows good sensitivity both in terms of frequency and intensity variations and good linearity. The sensor follows the RH variations in a fully reversible way and the response time is estimated in a few seconds.
Nafion-Based Chipless RFID Humidity Sensor for Smart Tag Applications
Marchi, Giada;Mulloni, Viviana
;Lorenzelli, Leandro
2023-01-01
Abstract
A humidity sensor based on frequency-domain microwave chipless technology is studied and experimentally characterized in this paper. The chipless microwave sensor is composed of a microwave resonator coupled with a 50 Ohm microstrip transmission line, covered with a 180 μm-thick Nafion layer, which acts as sensitive material. The response of the sensor at 25 °C and for a relative humidity (RH) variation in the range of 0–40% has been experimentally assessed. The sensor shows good sensitivity both in terms of frequency and intensity variations and good linearity. The sensor follows the RH variations in a fully reversible way and the response time is estimated in a few seconds.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
