Stress and Thermal Stress Compensation in Quartz SAW Devices

Abstract

In Surface Acoustic Waves (SAW) devices, the external perturbations induce static or quasi-static stresses and strains within the crystal, which by nonlinear coupling modify the phase velocity and therefore induce frequency shifts in SAW oscillators. Highly stabilized SAW oscillators need to minimize these effects. A theoretical search identified three (3) doubly rotated cuts which are both temperature-compensated and planar-stress compensated. Experimental measurements have been made on the three (3) doubly rotated cuts (including a cut close to B.K. Sinha's STC cut). They were found to be both temperature compensated and mechanically in-plane-compression-compensated. A dynamic thermal experiment showed that these cuts have one tenth the sensitivity of the standard ST-X cut.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1991
Accession Number
ADA240822

Entities

People

  • D. Hauden
  • Erin D. Bigler
  • S. Ballandras

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Waves
  • Cantilever Beams
  • Compression
  • Couplings
  • Delay Lines
  • Equations
  • Finite Element Analysis
  • Frequency
  • Frequency Shift
  • Measurement
  • Numerical Analysis
  • Perturbations
  • Surface Acoustic Wave Devices
  • Surface Acoustic Waves
  • Surface Waves
  • Temperature Coefficients
  • Waves

Readers

  • Acoustics.
  • Control Systems Engineering.
  • Thermal Physics or Thermal Science.