Accession Number : ADD012491

Title :   X33 Cut Quartz for Temperature Compensated SAW (Surface Acoustic Wave) Devices.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Webster,Richard T

Report Date : 22 Jul 1986

Pagination or Media Count : 6

Abstract : An X-cut, 33.44 degree quartz crystal for propagating surface acoustic waves with a temperature stability in the order of - 0.0209 ppm/sq. c. The crystal orientation requires only a single rotation (33.44 degrees) from the crystal axes. This orientation is substantially simpler than previously reported cuts with comparable temperature stability which typically require three rotations. The Xcut orientation has a surface acoustic wave (SAW) velocity of 3175 m/sec, an electromechanical coupling of 0.0004, and a power flow angle of 2.7 degrees. (Author)

Descriptors :   *PATENTS, *CRYSTALS, *THERMAL STABILITY, *SURFACE ACOUSTIC WAVES, ANGLES, AXES, FLOW, ORIENTATION(DIRECTION), POWER, ROTATION, WAVE PROPAGATION

Subject Categories : Acoustics
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE