| 摘要 |
A crystal resonator including at least three, typically four linear electrode segments, formed on one of the major faces of piezoelectric resonator blank and providing at least two gaps which are selectively excited by RF voltages of predetermined magnitude and phase for generating a resultant lateral-field oriented at an arbitrary angle PSI with respect to the coordinate axes of the crystal plate for varying the lateral-field piezoelectric coupling k which is a parameter indicative of the degree to which an electrical energy is converted to mechanical energy in the resonator. By adjusting the magnitude and phases of the excitation voltages, applied to the electrode segments, the lateral-field direction becomes steerable so as to alter the electrical characteristics of the resonator including the lateral-field excitation antiresonance frequency.
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