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General properties of the acoustic plate modes at different temperatures
V I Anisimkin1, I V Anisimkin1, N V Voronova2
1Kotel'nikov Institute of Radio Engineering and Electronics, RAS, Moscow 125009, Russia.
Abstract:
Using acoustic plate modes with SH-polarization and quartz crystal with Euler angles 0°, 132.75°, 90°, as an example, general properties of the acoustic plate modes at different temperatures are studied theoretically and experimentally in the range from -40 to +80°C. It is shown that in addition to well-known parameters responsible for temperature characteristics of acoustic waves the temperature coefficients of the acoustic plate modes depend on the mode order n, plate thickness h/λ, and expansion of the plate in direction of its thickness (h - thickness, λ - acoustic wavelength). These properties permit the mode sensitivity to be increased or decreased without replacing plate material and orientation.
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