Theoretical determination of the pseudo surface acoustic wave characteristic parameters
- 9 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. iv, 353-358
- https://doi.org/10.1109/ultsym.1991.234185
Abstract
A method of determining the characteristic parameters of the surface acoustic wave (SAW) and pseudo SAW (PSAW) for two electric surface conditions, free and metallized, is described. Valuations of the coupling factors, K/sup 2/, for free and metallized surfaces can be deduced from the characteristic parameters. They are in accordance with the classical definition 2 Delta V/V for K/sup 2/ for some Rayleigh SAWs (RSAWs). However, for Bluestein-Gulyaev SAWs (BGSAWs), PSAWs, and a number of RSAWs, the three possible valuations of K/sup 2/f are widely different. This means that the wave cannot be fully characterized by a single value of K/sup 2/ and depends strongly on the electric surface conditions. Thus, the study of the wave for free and fully metallized surfaces does not permit one to predict its behavior when a periodic grating is deposited on the surface.Keywords
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