Digitale Medien
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
65 (1989), S. 433-437
ISSN:
1089-7550
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
An equivalent circuit model analysis of a liquid-loaded interdigital transducer is described. The electric loss related to the complex relative dielectric constant and the electroacoustic conversion efficiency are represented in the form of a function of the specific acoustic impedance (ρv) of the loaded liquid. The conversion efficiency for ultrasound into the liquid is estimated from only the acoustic impedance and the relaxation time of the substrate material, which are obtained relatively easily from the water measurement. The estimated theoretical efficiency is in good agreement with the experimental results for various liquids. These results also coincide with the results from the wave equation for the leaky surface acoustic wave propagation at the solid–liquid boundary.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.343124
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