The Performance of a Leaky Surface Acoustic Wave Transducer Consisting of PVDF and Fused Quartz
A leaky surface acoustic wave transducer operating at a liquid-solid boundary radiates a longitudinal wave into water. The structure of aPVDF/ interdigital transducer/fused quartz plate is analyzed numerically to understand the transducer performance including the phase velocity and efficiency for the acoustic beam radiation into water in comparison with the characteristics in a structure incorporating a piezoelectric ceramic plate instead of PVDF. The zeroth-order mode has a large transducer efficiency, although the electromechanical coupling constant is small. The results are useful in designing an ultrasonic transducer for acoustical imaging and sensor technology.
KeywordsFuse Quartz PVDF Film Electrical Boundary Condition Interdigita1 Transducer Medical Ultrasound Imaging
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