title: Coupling to extension in a thickness-shear resonator due to relatively large thickness-shear deformation.
abstract: We show that in a plate thickness-shear mode resonator of rotated Y-cut quartz coupling to extension occurs when the shear deformation is no longer infinitesimal. A set of coupled equations is derived with which the effect of coupling to extension on the thickness-shear operating mode is examined.
authors.forename: Jiashi
authors.initials: J
authors.lastname: Yang
authors.forename: Xuechun
authors.initials: X
authors.lastname: Shen