Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 47702-047702.doi: 10.1088/1674-1056/22/4/047702
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
何慧晶a, 杨嘉实a, 张卫平b, 王骥c
He Hui-Jing (何慧晶)a, Yang Jia-Shi (杨嘉实)a, Zhang Wei-Ping (张卫平)b, Wang Ji (王骥)c
摘要: We study the effects of couplings to flexure and face-shear modes on the admittance of an AT-cut quartz plate thickness-shear mode resonator. Mindlin's two-dimensional equations for piezoelectric plates are employed. Electrically forced vibration solutions are obtained for three cases: pure thickness-shear mode alone; two coupled modes of thickness shear and flexure; and three coupled modes of thickness shear, flexure, and face shear. Admittance is calculated and its dependence on the driving frequency and the length/thickness ratio of the resonator is examined. Results show that near the thickness-shear resonance, admittance assumes maxima, and that for certain values of the length/thickness ratio, the coupling to flexure causes severe admittance drops, while the coupling to the face-shear mode causes additional admittance changes that were previously unknown and hence are not considered in current resonator design practice.
中图分类号: (Electromechanical resonance; quartz resonators)