Piezoelectric vibration element and piezoelectric filter

Details Piezoelectric vibration element and piezoelectric filter Piezoelectric vibration element and piezoelectric filter

2006-10-31

2006-10-31

Kinkead, Arnold (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S1160FE, C310S323060, C310S311000

Reexamination Certificate

active

07129799

ABSTRACT:
A piezoelectric oscillator using zinc oxide as a piezoelectric plate which eliminates unwanted resonance called inharmonic overtone by optimizing ratio Le/H of driving electrode length Le to oscillator thickness H. Ratio Le/H is set between 4 and 100 in the piezoelectric oscillator polarized in a thickness direction of a piezoelectric plate and using thickness extension vibration as main vibration or the piezoelectric oscillator polarized in a length direction of the piezoelectric plate and using thickness shear vibration as main vibration. This achieves stable characteristic because no unwanted resonance exists between the resonance frequency and anti-resonance frequency of the main vibration.

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International Search Report corresponding to applicaiton No. PCT/JP02/03176 dated Jul. 2, 2002.
“Analysis of Piezoelectric Resonators Vibrating in Trapped Energy Modes” by Morio Onoe et al.; Magazine of Institute of Telecommunications Engineers, vol. 48, No. 9, Sep. 1965, pp. 1574(70)-1581 (77) with a partial English translation.
“Energy Trapping and Related Studies of Multiple Electrode Filter Crystals” by William Shockley et al.; 17thAnn. Freq, Control Symposium, 1963 pp. 88-126.

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