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Journal Radioengineering №9 for 2010 г.
Article in number:
Method of Measurements of the Attenuation Constant and the Electromechanical Coupling in Acoustic Resonators
Keywords: electromechanical coupling coefficient resonance attenuation impedance quality factor
Authors:
G.D. Mansfel-d, S.G. Alekseev, N.I. Polzikova, I.M. Kotelyanskiy
Abstract:
It is shown that difference between the frequencies of modulus of electric impedance depends on both the electromechanical coupling constant and the attenuation coefficient in the acoustic resonator. Using simple expression , where Im Ze is a difference between the peculiarities on the frequency dependence of an imagine part of the electric impedance, that can be measured with network analyzer, the attenuation coefficient and the quality factor ( ? resonant frequency) of any acoustic resonator can be easily evaluated. The expressions that can be used for evaluation of electromechanical coupling constant using data of the measurements of fre-quency dependencies of the modulus of Ze and Im Ze were obtained.
Pages: 42-46
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