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.
2023
978-3-031-25705-6
978-3-031-25706-3
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11582/336287
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