Theory of high overtone bulk acoustic wave resonator as a gas sensor

A one-dimensional model analysis based on the high overtone bulk acoustic wave resonator (HEAR) spectroscopy theory is developed for the description of the operation of gas sensors. The sensor model consists of a thin film transducer with film electrodes located on the face surface of the low acoust...

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Main Author: Mansfeld, G.D.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic sensors
Acoustic transducers
Acoustic waves
Electrodes
Film bulk acoustic resonators
Gas detectors
Harmonic analysis
Spectroscopy
Surface acoustic waves
Thin film sensors
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description A one-dimensional model analysis based on the high overtone bulk acoustic wave resonator (HEAR) spectroscopy theory is developed for the description of the operation of gas sensors. The sensor model consists of a thin film transducer with film electrodes located on the face surface of the low acoustic loss material plate with the other surface of the plate covered with a gas sensitive layer. The model implies the fact that the thickness of this layer increases due to gas absorption resulting in the frequency change of the resonator. It was found analytically that the sensor sensitivity increases a hundred times when the initial thickness of the layer is close to a quarter of the acoustic wavelength.
doi_str_mv 10.1109/MIKON.2000.913971
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identifier ISBN: 8390666235
ispartof 13th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2000. Conference Proceedings (IEEE Cat. No.00EX428), 2000, Vol.2, p.469-472 vol.2
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Acoustic sensors
Acoustic transducers
Acoustic waves
Electrodes
Film bulk acoustic resonators
Gas detectors
Harmonic analysis
Spectroscopy
Surface acoustic waves
Thin film sensors
title Theory of high overtone bulk acoustic wave resonator as a gas sensor
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