Hexagonal quartz resonator
AssigneeThe United States of America as represented by the Secretary of the Army
InventorRoswell D. M. Peters
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Abstract
A generally flat, relatively thin AT-cut piezoelectric resonator element structured to minimize the force-frequency effect when mounted and energized in a housing. The resonator is in the form of an equilateral hexagon with the X crystallographic axis of the crystal passing through one set of opposing corners with mounting being effected at an adjacent set of corners respectively .+-.60.degree. away from the X axis which thereby results in a substantially zero frequency shift of the operating frequency.
Claims10
A plate-like resonator of piezoelectric material having a predetermined crystallographic orientation defined by at least one crystallographic axis, wherein said resonator comprises a substantially equilateral hexagon and wherein said crystallographic axis passes through one set of corners of said hexagon and said resonator includes mounting regions existing at mutually adjacent corners along a mounting axis having a .+-.60.degree. angular orientation with respect to said crystallographic axis for producing a predetermined desired effect upon the resonant frequency of said mounted resonator.
A plate-like resonator of piezoelectric material wherein said resonator describes a substantially equilateral hexagon having a plurality of equally spaced corners, having a predetermined crystallographic orientation defined by at least one crystallographic axis passing through one set of corners of said hexagon and including first and second mounting regions at mutually adjacent corners defining a mounting axis having a predetermined angular orientation of .+-.60.degree. with respect to said crystallographic axis for producing a substantially zero frequency shift effect upon the resonant frequency of said resonator so that said resonator is isolated from mechanical forces and thermal effects experienced by said resonator.
Dependencies are inferred from the claim text.