J Mater Sci Technol ›› 2004, Vol. 20 ›› Issue (05): 512-516.

• Research Articles • Previous Articles     Next Articles

Theoretical Studies on the SAW Properties of LGS at High-Temperature in Optimal Cuts

Xiaojun JI, Tao HAN, Wenkang SHI, Guowei ZHANG   

  1. Department of Instrumentation Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-09-28 Published:2009-10-10
  • Contact: Tao HAN

Abstract: Surface acoustic wave (SAW) devices play a significant role in signal processing, frequency control and sensing applications. In general, they cannot operate at elevated temperature. The new crystal of langasite provides possibility for surface acoustic wave devices applied at high temperature. This paper studies the SAW properties of single and doubly rotated cuts of LGS at high temperature. The calculated SAW properties of LGS are analyzed in space with aid of contour plots, and two promising SAW orientation regions at high temperature are presented. For some typical cuts and propagating directions within the two optimal regions, their SAW characteristics vs temperatures are discussed. Based on the experimental evidence in some literatures, the reliability of calculated results is verified.

Key words: High-temperature, Surface acoustic wave, Langasite, Optimal cuts