Normal Coordinate Monolithic Crystal Filter.

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Abstract:

The foregoing and other objects of the invention are provided by the method and means for reducing the undesired mode couplings, improper phase and insertion loss responses as well as compensating for stress and transient temperature effects on the SC cut of quartz, for example, by aligning the electrode length, including the sides thereof, fabricated on the surfaces of the crystal plate along the direction of projection of the eigenvector the normal coordinate, and, in the case of trapped energy monolithic filter, arranging the electrode gap so that the gap is perpendicular to the eigenvector projection. For the SC cut of quartz operating in the shear mode c-mode the projection angle of the eigenvector as well as the direction of the electrodes is at an angle of approximately 8.2 degrees from the X axis of the doubly rotated cut.

Author(s):
Ballato, A.
Author Organization(s):
DEPARTMENT OF THE ARMY WASHINGTON DC
Descriptive Note:
Patent Application,
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Availability: This Government-owned Invention Available For U.s. Licensing And, Possibly, For Foreign Licensing. Copy Of Application Available Ntis.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PAT-APPL-669 147
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Patent applications, *Crystal filters, *Piezoelectric crystals, *Monolithic structures(Electronics), Couplings, Reduction, Phase, Losses, Insertion loss, Stresses, Transients, Thermal properties, Quartz, Electrodes, Length, Alignment, Orientation(Direction), Eigenvectors, Inventions
Field(s)/Group(s):
Electrical and Electronic Equipment
Report Date:
1984 Jan 11