MEHRFACHRESONATOR ODER -FILTER, DER IN EINER GEKOPPELTEN MODE SCHWINGT

摘要

A multiple resonator or filter is described in the form of a rectangular bar of piezoelectric material having dimensional ratios selected so as to assure vibration in a thickness shear mode strongly coupled with a flexural mode. At least two energy trapping zones are provided extending over the entire width of the bar. The arrangement enables achievement of a high quality factor combined with extremely small dimensions.