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Related Experiment Videos

Improved equivalent circuits for acoustic plate wave devices.

B D Zaitsev1, I E Kuznetsova, S G Joshi

  • 1Institute of Radio Engineering and Electronics, Saratov, Russia. zaitsev@ire.san.ru

Ultrasonics
|August 6, 2002
PubMed
Summary

This study introduces a new mixed equivalent circuit for analyzing acoustic plate wave devices. This method enhances the design of transducers and accurately determines acoustic wave velocity.

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Area of Science:

  • Acoustic wave devices
  • Piezoelectric materials
  • Transducer design

Background:

  • Acoustic plate wave devices are crucial in various electronic applications.
  • Accurate modeling of interdigital transducers (IDTs) is essential for device performance.
  • Existing equivalent circuit models may lack precision for complex designs.

Purpose of the Study:

  • To present an improved equivalent circuit model for acoustic plate wave devices.
  • To enable precise analysis and optimization of interdigital transducer (IDT) designs.
  • To accurately determine acoustic wave velocity for material characterization.

Main Methods:

  • Developed a mixed equivalent circuit model incorporating active and passive transducer sections.
  • Determined circuit element values by fitting theoretical predictions to experimental input impedance data.

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  • Applied the model to design one-port shear-horizontal wave resonators on lithium niobate.

    • Main Results:

    • The proposed equivalent circuit accurately models transducer behavior across a frequency range.
    • Optimized designs for shear-horizontal wave resonators were successfully achieved.
    • The method demonstrated high accuracy in determining acoustic wave velocity.

    Conclusions:

    • The improved equivalent circuit offers a powerful tool for acoustic plate wave device analysis and design.
    • This approach facilitates the optimization of transducer parameters for enhanced device performance.
    • The method provides a reliable means for accurate acoustic wave velocity measurement.