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Related Experiment Videos

Analysis of general multi-channel planar waveguides.

Mario Jungwirth1, Norbert Pöcksteiner, Günther Kovacs

  • 1Institute for Communications and Information Engineering, University of Linz, Austria. jungwirth@mechatronik.uni-linz.ac.at

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|May 7, 2002
PubMed
Summary

This study introduces a planar waveguide model for surface acoustic wave (SAW) devices, enabling accurate simulation of complex multi-track structures like transversely coupled resonator filters (TCRFs). The method effectively analyzes various wave modes for improved SAW device design.

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Area of Science:

  • Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Surface Acoustic Wave (SAW) device design requires accurate modeling of transversely distributed phenomena.
  • Complex structures like transversely coupled resonator filters (TCRFs) necessitate detailed simulation of transverse velocity and stiffness profiles.

Purpose of the Study:

  • To develop an efficient mathematical tool for simulating TCRFs.
  • To provide a comprehensive analysis of general SAW multi-channel structures using the planar waveguide concept.

Main Methods:

  • Subdividing SAW structures into parallel waveguiding channels (N regions).
  • Utilizing a two-dimensional scalar potential function to describe wave propagation.
  • Employing the stack matrix technique to calculate bound, semi-bound, and radiation modes.

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Main Results:

  • A complete set of orthonormal modes was obtained for arbitrary transverse excitation functions.
  • The general mode spectrum includes discrete bound modes and continuous semi-bound and radiation modes.
  • The planar waveguide approach effectively models SAW propagation in multi-track structures.

Conclusions:

  • The developed model provides an efficient mathematical tool for TCRF simulation.
  • This approach offers a complete analysis of general SAW multi-channel structures.
  • The planar waveguide concept is advantageous for modeling complex SAW devices.