Abstract
An equivalent network approach is described for the anlysis of surface acoustic wave metallic gratings. Circuit parameters can be theoretically determined by applying the finite-element method to an infinite array. To show the validity and usefulness of this approach, examples are computed for aluminum strips on 128°Y–X LiNbO3, ST–X quartz, X–112°Y LiTaO3, and 45°X–Z Li2B4O7 substrates. Results show that for the Al/45°X–Z Li2B4O7 structure, the reflection magnitude per strip is large and the influence of the change of strip-thickness on the center-frequency shift is small.
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