Propagation Characteristics of Surface Acoustic Waves on Langasite

Autor:	Kenji Inoue, Katsuo Sato
Rok vydání:	1998
Předmět:	Surface (mathematics) Chemistry Numerical analysis Acoustics Surface acoustic wave General Engineering General Physics and Astronomy Material constants Direct search Acoustic wave Temperature coefficient Coupling coefficient of resonators Computational physics
Zdroj:	Japanese Journal of Applied Physics. 37:2909
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.37.2909
Popis:	The propagation characteristics of surface acoustic waves (SAW) on La3Ga5SiO14 were investigated by both experimental and numerical methods. The experimental results of the SAW velocity and the coupling coefficient (k 2) on X-cut and Y-cut substrates were in good agreement with the numerical results using the material constants reported previously. However, the experimental results of the temperature coefficient of delay (TCD) differed from that of the numerical calculations. So, a modification of the temperature coefficients of the material constants was performed numerically by the measured data using the direct search of optimization method. The numerical results obtained using the new constants were in good agreement with the experiment result on the X-cut and Y-cut substrates. Other cuts were also studied using the new constants. Then it was confirmed theoretically and experimentally that the temperature stable cut was located at (0°, 140°, 22.5°) cut with k 2 of 0.32% and TCD (second-order coefficient) of 5.2×10-8/°C2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e53467efdbaed62570b75bbaa209719 https://doi.org/10.1143/jjap.37.2909 Zobrazit plný text záznamu