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Shear-wave transducer using ferroelectric medium with distributed polarisation

Shear-wave transducer using ferroelectric medium with distributed polarisation

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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.

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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