The Journal of the Acoustical Society of Korea

The Acoustical Society of Korea (한국음향학회)
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Experimental Verification of the Unified Formula for Electromechanical Coupling Coefficient of Piezoelectric Resonators

  • Kim, Jung-Soon (Department of Multimedia Engineering, Tongmyong University) ;
  • Kim, Moo-Joon (Department of Physics, Pukyong National University) ;
  • Ha, Kang-Lyeol (Department of Physics, Pukyong National University) ;
  • Cao, Wen-Wu (Materials Research Institute, the Pennsylvania State University)
  • Published : 2006.09.15
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Abstract

In a previous theoretical paper, we have derived a unified formula by considering 2-D coupled mode vibrations. The unified formula for electromechanical coupling coefficient of piezoelectric resonator was verified experimentally. The capacitance change near the resonant frequency was investigated to estimate the effective coupling coefficient of the resonator instead of the conventional method based on I-D model. The susceptance spectra were measured for the seven samples of piezoelectric resonator with different aspect ratio. Excellent agreement between theoretical and experimental results was obtained.

Keywords

References

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