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Analysis of focused surface wave transducers

Analysis of focused surface wave transducers

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IEE Proceedings G (Circuits, Devices and Systems) — Recommend this title to your library

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A new acoustic field analysis, based on the Huygens principles, is given for an elastic surface acoustic wave convolver, made by using a focused transducer on a YZ-LiNbO3 piezoelectric crystal. In the acoustic field analysis, a new slowness function approximation is suggested for the anisotropy of the medium, instead of the conventional parabolic slowness function. The acoustic field analysis obtained by using this function is compared to the other analysis techniques and the results are discussed.

References

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      • Wagers, R.S., Goll, J.H.: `Dispersion and multimoding in monolithic elastic convolvers', IEEE Ultrasonic Symposium Proceedings, 1980, p. 48–52.
    2. 2)
      • Green, J.B., Kino, G.S., Khuriyakup, B.T.: `Focused surface wave transducers on anisotropic substrates: A theory for the wave guided storage correlator', IEEE Ultrasonic Symposium Proceedings, 1980, p. 69–73.
    3. 3)
      • I.M. Mason , E.E. Ash . Acoustic surface wave beam diffraction on anisotropic substrates. J. Appl. Phys. , 13 , 5345 - 5351
    4. 4)
      • J.B. Green , J.S. Kino . SAW convolvers using focused interdigital transducers. IEEE Trans. , 1 , 43 - 50
    5. 5)
      • J. Campbell , W.R. Jones . A method for estimating optimal crystal cuts and propagating directors for excitation of piezoelectric surface waves. IEEE Trans. , 209 - 217
    6. 6)
      • G. Tyres . (1969) , Radiation and propagation of electromagnetic waves.
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