PEM QUARTZ CRYSTAL UNITS, FILTER LOW FREQUENCY, 1 MC TO 10 MC TYPES CR-(XM-49)/U THRU CR-(XM-52)/U.
Abstract
Planoconvex plates, with diameter over thickness (D/T) ratios below 20, exhibit freedom from unwanted responses in the frequency region of nominal frequency =5%. For planoconvex plates, excessively large gamma sub o values can be avoided by judicious selection of the plating spot diameter: At any specific frequency, the optimum spot for every contour radius which produces the minimum gamma sub o value - has to be determined by experimentation. At D/T ratios below 20, conventional crystal mounts introduce severe damping at frequencies 6 mc and above; as a result, series resistance values will exceed specified maximums if adequate mounting methods are not employed. The mounting problem has not been fully solved; more work remains. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 15, 1965
- Accession Number
- AD0612103
Entities
People
- A. S. Matistic