XU Fangqian1,2 HE Shitang2 LIU Jiansheng2 CHEN Yixiang1
(1 Zhejiang Institute of Communication Media Hangzhou 310018)
(2 Institute of Acoustics, Chinese Academy of Sciences Beijing 100190)
Received Mar. 15, 2007
Revised Dec. 28, 2008
Abstract Based on D.P. Chen and Haus' theory, a theoretical method was presented to analyze dispersion characteristics of SH-type surface acoustic waves (SAWs) propagating on periodic metallic grating structures with a variational principle and coupling-of-modes equation. Without using complicated Green's function, the calculating results of the method agree well with those of Hashimoto's theory. On the other hand, Hashimoto's method is helpless for calculating the dispersion relation of short-circuited gratings on ST-90 degree X quartz etc. However, the method developed in this paper can successful calculate it.
PACS numbers: 43.60
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