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Proceedings Paper

Impedance measurement of quartz crystal based on network analysis method
Author(s): Guili Liu; Zhengjie Dong; Dong Li; Yanlin Wang
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Paper Abstract

A method for the determination of impedance of quartz crystal using automatic network analyzer electrical techniques is introduced in this paper. The vector network analyzer ENA 5070B which is produced by Agilent Company is taken to measure S parameters in short-circuit, open-circuit and crystal-circuit. The algorithm recommended in international standard IEC444-5 is based on theory of two-port S parameter transmission method and relationships between transmission admittance (Y21) and scattering parameters(S parameters). By data analysis, circuit symmetry is good. And around the resonance frequency, amplitude and phase of S parameters have obvious display the crystal characteristics. The phase is not zero on the resonance frequency because of lead inductance and parasitic capacity. The amplitude/phase-frequency curve of crystal impedance, which is in conformity with the stimulation of the crystal model, is achieved. By de-embedding process, high accuracy of series resonant frequency and the impedance around it are measured. Results have created favorable conditions for precisely determining the values of the electrical parameters of quartz crystal units.

Paper Details

Date Published: 27 May 2011
PDF: 7 pages
Proc. SPIE 7997, Fourth International Seminar on Modern Cutting and Measurement Engineering, 79972N (27 May 2011); doi: 10.1117/12.888541
Show Author Affiliations
Guili Liu, Beijing Information Science & Technology Univ. (China)
Zhengjie Dong, Beijing Information Science & Technology Univ. (China)
Dong Li, Beijing Information Science & Technology Univ. (China)
Yanlin Wang, Beijing Information Science & Technology Univ. (China)


Published in SPIE Proceedings Vol. 7997:
Fourth International Seminar on Modern Cutting and Measurement Engineering

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