ZHENG Min　  WEN Yumei　  LI Ping

 (College of Opto-electronic Engineering, The Key Laboratory for Opto-electronic Technology & Systems, Ministry of Education, Chongqing University  Chongqing 400030)

Received Jun. 11, 2008

Revised Aug. 5, 2008

Abstract When a force is directly applied to the propagation surface of surface acoustic wave (SAW), the velocity of SAW is varied. Then the loading force can be introduced by effective material coefficients and the velocity of SAW is calculated via the general Green's Function. The experimental results accord with the above numerical calculation very well. It also shows that the propagation loss will increase with the force load, and the velocity variation of SAW is proportional to the force loaded to the surfaces of SAW resonators, which has high sensitivity about 5.97 m/s.N.

PACS numbers: 43.35