Abstract
In this paper, we propose a humidity sensor based on a negative resistance oscillator using conducting polymer (CP) PEDOT:PSS film at room temperature. The proposed humidity sensor basically consists of a microstrip line and a negative resistance circuit, which creates a negative resistance for high-frequency oscillation. The microstrip line has a circuit structure that is connected through a via hole between the ground plane and the signal line with a CP thin film. From our experimental results, we find that the oscillation frequency of the sensor gradually decreases as the relative humidity (RH) increases. Owing to the conductivity variation of the CP film with the RH value, the oscillation frequency of the sensor sensitively changes in real time. Therefore, we suggest that our microwave-oscillator-based sensor scheme is a good candidate for the design of a robust and stable humidity sensor.
| Original language | English |
|---|---|
| Pages (from-to) | 145-151 |
| Number of pages | 7 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 282 |
| DOIs | |
| Publication status | Published - 2019 Mar 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry
Cite this
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A real-time humidity sensor based on a microwave oscillator with conducting polymer PEDOT:PSS film. / Kang, Tae Gyu; Park, Jin Kwan; Yun, Gi Ho; Choi, Hyang Hee; Lee, Hee Jo; Yook, Jong Gwan.
In: Sensors and Actuators, B: Chemical, Vol. 282, 01.03.2019, p. 145-151.Research output: Contribution to journal › Article
TY - JOUR
T1 - A real-time humidity sensor based on a microwave oscillator with conducting polymer PEDOT:PSS film
AU - Kang, Tae Gyu
AU - Park, Jin Kwan
AU - Yun, Gi Ho
AU - Choi, Hyang Hee
AU - Lee, Hee Jo
AU - Yook, Jong Gwan
PY - 2019/3/1
Y1 - 2019/3/1
N2 - In this paper, we propose a humidity sensor based on a negative resistance oscillator using conducting polymer (CP) PEDOT:PSS film at room temperature. The proposed humidity sensor basically consists of a microstrip line and a negative resistance circuit, which creates a negative resistance for high-frequency oscillation. The microstrip line has a circuit structure that is connected through a via hole between the ground plane and the signal line with a CP thin film. From our experimental results, we find that the oscillation frequency of the sensor gradually decreases as the relative humidity (RH) increases. Owing to the conductivity variation of the CP film with the RH value, the oscillation frequency of the sensor sensitively changes in real time. Therefore, we suggest that our microwave-oscillator-based sensor scheme is a good candidate for the design of a robust and stable humidity sensor.
AB - In this paper, we propose a humidity sensor based on a negative resistance oscillator using conducting polymer (CP) PEDOT:PSS film at room temperature. The proposed humidity sensor basically consists of a microstrip line and a negative resistance circuit, which creates a negative resistance for high-frequency oscillation. The microstrip line has a circuit structure that is connected through a via hole between the ground plane and the signal line with a CP thin film. From our experimental results, we find that the oscillation frequency of the sensor gradually decreases as the relative humidity (RH) increases. Owing to the conductivity variation of the CP film with the RH value, the oscillation frequency of the sensor sensitively changes in real time. Therefore, we suggest that our microwave-oscillator-based sensor scheme is a good candidate for the design of a robust and stable humidity sensor.
UR - http://www.scopus.com/inward/record.url?scp=85056736698&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85056736698&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2018.09.080
DO - 10.1016/j.snb.2018.09.080
M3 - Article
VL - 282
SP - 145
EP - 151
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -