Miniaturized LiTaO3 Strip Resonator,

Abstract

The piezoactive shear wave in LiTaO3 X-cut plate has a velocity of 4330 m/s for the fast mode and attractively high electro-mechanical coupling (47%). But the temperature characteristics of the X-cut plate resonator shows a 500 ppm change in the resonant frequency between - 10 deg. C and 60 deg. C. We developed a miniaturized strip plate type LiTaO3 resonator with stable temperature characteristics. In this paper, the displacement orientation of the thickness shear mode was studied in order to decide the crystal orientation of the longitudinal direction of the strip. Measurement of the Q factor with different rotation angles showed that displacement orientation of the fast mode was -48 deg. from the +Y axis. The width of the strip plate was chosen to separate the main mode from spurious modes. The experiment study shows that the optimum ratio of width to thickness is 1.5 to 2.0 or 2.8 to 3.0.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1983
Accession Number
ADP002498

Entities

People

  • N. Wakatsuki
  • S. Yamada
  • Y. Fujiwara

Tags

DTIC Thesaurus Topics

  • Couplings
  • Displacement
  • Frequency
  • Frequency Shift
  • Measurement
  • Orientation (Direction)
  • Pennsylvania
  • Q Factor
  • Resonant Frequency
  • Resonators
  • Rotation
  • Secondary Waves
  • Thickness
  • Waves

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics
  • Microwave Engineering.