Nonlinear frequency shift in surface acoustic wave resonator operating as a gas sensor

被引：0
|
作者：
R. G. Kryshtal
A. V. Medved
机构：
[1] Russian Academy of Sciences,Kotel’nikov Institute of Radio Engineering and Electronics (Fryazino Branch)
来源：
Technical Physics | 2008年 / 53卷
关键词：
43.25.Dc; 85.50.Gk;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The shift in the resonance frequency of a two-port quartz surface acoustic wave (SAW) resonator operating as a gas sensor without a selective layer is studied versus the power of an SAW excited in the resonator. At working frequencies of the resonator (≈389 MHz) placed in the flow of moisture-containing nitrogen gas, an anomalously large positive shift of the resonance frequency is observed as the SAW power exceeds 1 mW. This shift is one order of magnitude larger than that due to the nonlinear amplitude-frequency effect, which is known for quartz SAW resonators. Possible physical mechanisms underlying this phenomenon are analyzed. Experimental data indicate that such a shift is associated with the influence of a powerful SAW on sorption processes taking place on the active surface of the resonator rather than being a direct consequence of heating of the SAW substrate by the powerful SAW.
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页码：899 / 904
页数：5
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