THE INFLUENCE OF ELECTRODES ON THE FREQUENCY-TEMPERATURE CHARACTERISTICS OF ROTATED Y-CUT QUARTZ RESONATORS

The incremental two-dimensional equation of motion for small amplitude waves superposed on the homogeneous thermal strain are used for the t heoretical description of the influence of the elastic stiffnesses and inertia of electrodes on the frequency-temperature characteristics of the fundamental thickness-shear vibration of the rotated Y-cut quartz resonators. The resonators are considered in the shape of the strip b ounded in the X axis direction of the quartz crystal and fully covered on the faces perpendicular to the thickness direction by conducting e lectrodes. The piezoelectric properties of a quartz plate are neglecte d. The theoretically obtained results are compared with the measured f requency-temperature characteristics of the AT- and BT-cut quartz plat es. (C) 1997 Elsevier Science B.V.