title: Experimental evidence for mode shape influence on acceleration-induced frequency shifts in quartz resonators.
abstract: Experimental results are presented to support the hypothesis that the shape and location of the active region of vibration in a thickness shear mode quartz resonator are the dominant factors in determining the acceleration sensitivity of the resonator. The shape and location of the mode in a real world resonator vary sufficiently from unit to unit (due to material and processing variations) that all other considerations are overwhelmed. It is shown experimentally that the mode shape and/or location can be trimmed with energy trapping by judicious addition or subtraction of mass to produce resonators with improved acceleration sensitivity.
authors.affiliation: Quartztronics Inc., Salt Lake City, UT.
authors.forename: E P
authors.initials: EP
authors.lastname: Eernisse
authors.forename: R W
authors.initials: RW
authors.lastname: Ward
authors.forename: M H
authors.initials: MH
authors.lastname: Watts
authors.forename: R B
authors.initials: RB
authors.lastname: Wiggins
authors.forename: O L
authors.initials: OL
authors.lastname: Wood