Shear-wave transducer using ferroelectric medium with distributed polarisation

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Shear-wave transducer using ferroelectric medium with distributed polarisation

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© The Institution of Electrical Engineers
Published

A new type of transducer has been obtained for exciting only tangential displacement of a wave using an interdigital transducer. The device utilises a ferroelectric medium with a distributed polarisation caused by interdigital electrodes. An exciting interdigital electrode is located at the optimum position with respect to the polarisation pattern. Experimental results obtained with one such transducer are presented.

Inspec keywords: polarisation; ultrasonic transducers; surface acoustic wave devices

Other keywords: tangential displacement; interdigital transducer; ferroelectric medium; shear wave transducer; distributed polarisation

Subjects: Transduction; devices for the generation and reproduction of sound; Sonic and ultrasonic transducers and sensors; Acoustic wave devices

References

    1. 1)
      • L.J. van der Pauw . The planar transducer—A new type of transducer for longitudinal acoustic waves. Appl. Phys. Lett. , 129 - 131
    2. 2)
      • Yamanouchi, K., Sachse, W.: `Shear wave electrostatic acoustic transducers', Proc. IEEE ultrasonics symposium, 1980, p. 571–575.
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