Experimental study of Love wave sensor response by phase and group velocity measurement

Martin, Fabrice, McHale, Glen and Newton, Michael (2004) Experimental study of Love wave sensor response by phase and group velocity measurement. IEEE Sensors Journal, 4 (2). pp. 216-220. ISSN 1530-437X

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Official URL: http://dx.doi.org/10.1109/JSEN.2004.823674


The effect of dispersion on acoustic wave sensors is considered experimentally. A recent theoretical prediction that the phase velocity mass sensitivity of guided shear horizontal surface acoustic wave devices can be obtained using measurements of phase and group velocity, and that the group velocity is highly sensitive to mass loading, is investigated. Experimental data for a polymer-coated surface-skimming bulk wave device on an ST quartz substrate is presented. Measurements of phase velocity, group velocity, and insertion loss determined by a network analyzer were obtained by systematically increasing the guiding layer thickness. Liquid sensing using poly (ethylene glycol) solutions with increasing densities were performed and phase and group velocities measured. The increase in mass sensitivity With the guiding layer thickness is significant and the data confirms the theoretical prediction that group velocity is a more sensitive parameter than the phase velocity to liquid loading.

Item Type: Article
Uncontrolled Keywords: liquid loading, Love wave, mass sensitivity, sensor, acoustic wave
Subjects: F300 Physics
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Glen McHale
Date Deposited: 23 Aug 2012 14:53
Last Modified: 12 Oct 2019 19:05
URI: http://nrl.northumbria.ac.uk/id/eprint/8341

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