Abstract
It is shown that surface mode conversion can take place in the reflecting grating on some piezoelectric crystals. When one of the modes is piezoelectrically coupled, while the other is not, the resonator performance will not be sensitive to the IDT position in the resonator cavity region.References
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[2] E. DANICKI, Reflection of SAW from periodic shallow grooves, Wave motion, 9, pp. 445-453 (1987).
[3] E. DANICKI, Perturbation theory of surface acoustic wave reflection from a periodic structure with arbitrary angle of incidence, Arch. Mech., 36, pp. 623-638 (1984).
[4] M. F. LEWIS, Surface skimming bulk waves, SSBW, IEEE Ultras. Symp. Proc. p. 744 (1977).
[S] E. DANICKI, Propagation of transverse surface acoustic waves in rotated Y-cut quartz under heavy periodic metal electrodes, IEEE Trans., SU-30, pp. 304-312 (1983).
[6] E. DANICKI, Analysis of nearly periodic IDTs by means of scattering matrix for periodic metal strips, Int. Sch. Phys. Acoust., Erice, Italy 1988, World Sci. Singapore 1989, pp. 425-440.
