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This study aims at developing an AT-cut quartz resonator with low anchor loss. Phononic crystals are utilized for trapping acoustic energy and reducing anchor loss of the AT-cut quartz resonators. Finite element analyses of the AT-cut quartz resonators with phononic crystals and the lossy epoxy attachments are presented herein. The resonance response of an AT-cut quartz resonator with no phononic...
In the design of quartz crystal resonators, it is always required to have complete information about vibration couplings in the vicinity of thickness-shear mode for the suppression of spurious modes which always cause performance degradation as one of the most serious challenges in product development. The couplings of vibration modes are caused by the finite size of plates and material constants,...
Spurious modes caused by inharmonic overtones are one of the most familiar problems of AT-cut quartz resonators. Mindlin and Lee had explained this phenomenon theoretically in detail in the 1960's [1]. Their calculation results were also shown to be in good agreement with the experimental data from Curran and Koneval, which are based on quartz plates with relatively large length, width and thickness...
The work of an efficient design tool for engineers to enhance the frequency stability performance of AT-cut quartz crystal resonator in whole working temperature range is presented. Based on Mindlin's 2D AT-cut plate model, the design tool is a finite element analysis(FEA) program to simulate quartz plate vibration with partial electrodes(mass loading), finite dimensions(free edge), piezoelectric...
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