Humidity sensor based on near zero index media

Near-zero index (NZI) media has the characteristics of local field enhancement, local tunneling and tunneling effect. Here a humidity sensor based on near-zero permittivity (ENZ) media is proposed, which uses the substrate integrated waveguide (SIW) technology. The tunnel height of the designed sens...

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Bibliographic Details
Main Authors: Zhou, Yong Jin, Mao, Yu Wei
Format: Conference Proceeding
Language:English
Subjects:
Frequency measurement
Humidity
Humidity measurement
Media
metamaterials
near zero index
Polyimides
Sensitivity
sensor
Tunneling
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Summary:Near-zero index (NZI) media has the characteristics of local field enhancement, local tunneling and tunneling effect. Here a humidity sensor based on near-zero permittivity (ENZ) media is proposed, which uses the substrate integrated waveguide (SIW) technology. The tunnel height of the designed sensor is much smaller than the height of the SIW structure. It can be observed that there exist strong electric fields in the ENZ tunnel. Placing humidity-sensitive materials in the structure can realize a high-sensitivity humidity sensor. When the humidity changes, it is observed that the frequency of the sensor has changed, and its sensitivity is 1.07 MHz/RH, which proves that the sensor can effectively measure the changes in environmental humidity.
ISSN:2694-2968
DOI:10.1109/GSMM53250.2021.9511890