Humidity and Temperature Dual Flexible Microwave Sensor
Language
EN
Communication dans un congrès
This item was published in
2022 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2022 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2022-10-24, Glasgow. 2022-10p. 1-4
English Abstract
A dual flexible microwave sensor is presented for humidity and temperature sensing. The sensor consists of two microstrip interdigitated resonators printed on a flexible Kapton substrate. One resonator is coated with ...Read more >
A dual flexible microwave sensor is presented for humidity and temperature sensing. The sensor consists of two microstrip interdigitated resonators printed on a flexible Kapton substrate. One resonator is coated with polyethyleneimine silane 1:0.5 and the other is left uncoated. The coated resonator at 3.26 GHz showed a good sensitivity of - 0.45 MHz/%RH and -0.01 dB/%RH in a range of 35 - 85 % RH, with low hysteresis (<5%), and -0.192 MHz/°C and 0.01 dB/°C in a range of 30 - 45 °C. On the other hand, the uncoated resonator showed a linear response and high hysteresis (> 30%) with a low sensitivity of -0.045 MHz/%RH and 0 dB/%RH under humidity. It showed a temperature sensitivity of 0.07 MHz/oC and 0.01 dB/oC. RH sensitivity does not vary with temperature for both the coated and uncoated resonators. The uncoated resonator showed a distinct RH-independent temperature sensitivity in magnitude which makes it easier to decorrelate variations of both parameters.Read less <
Keywords
Temperature sensors
Microwave integrated circuits
Sensitivity
Humidity
Microwave sensors
Microwave circuits
Sensors
Dual microwave sensor
Humidity
Temperature
Polymer sensitive material
Passive resonator