Analysis of focused surface wave transducers

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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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© The Institution of Electrical Engineers
Published

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.

Inspec keywords: piezoelectric transducers; surface acoustic wave devices; ultrasonic transducers; lithium compounds; acoustic field

Other keywords: elastic surface acoustic wave convolver; elastic convolvers; focused interdigital transducers; YZ-LiNbO3; anisotropy; Huygens principles; piezoelectric crystal; acoustic field analysis; slowness function approximation; focused surface wave transducers; LiNbO3

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

References

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      • I.M. Mason , E.E. Ash . Acoustic surface wave beam diffraction on anisotropic substrates. J. Appl. Phys. , 13 , 5345 - 5351
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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.
    3. 3)
      • 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.
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      • 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
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      • G. Tyres . (1969) , Radiation and propagation of electromagnetic waves.
    6. 6)
      • J.B. Green , J.S. Kino . SAW convolvers using focused interdigital transducers. IEEE Trans. , 1 , 43 - 50
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