Propagation Characteristics of Surface Acoustic Waves on LGT and Quartz Substrates |
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Affiliation: | [1]School of Electric Power &Automation, Shanghai University of Electric Power, Shanghai 200090, China; [2]School of Mechanical Engineering, Shanghai Dianji University, Shanghai 200240, China |
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Abstract: | Langatate( LGT) is a novel piezoelectric crystal; its structure is similar to quartz. A numerical analysis of the most important propagation characteristics of surface acoustic waves( SAW) on LGT and quartz is presented in this paper. The results show that the phase velocity on LGT is slower than that on quartz.Similar to quartz,there are zero temperature cuts and pure module orientations on LGT. The electro-mechanical coupling constant( k2)of LGT is larger than that of quartz. The characteristics of SAW on LGT with different material constants are calculated and compared.The results show that there are somewhat deviations with different material constants. Especially, the temperature coefficient of frequency( TCF) shows a relatively high difference. |
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Keywords: | Langatate(LGT) quartz surface acoustic waves(SAW) |
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