Title :
Detecting weak modes in rectangular quartz plates by measuring surface charges
Author :
Watanabe, Yasuaki ; Tanaka, Tomohiko ; Goka, Shigeyoshi ; Sekimoto, Hitoshi
Author_Institution :
Graduate Sch. of Eng., Tokyo Metropolitan Univ., Japan
Abstract :
This paper describes a measurement technique for detecting the weak spurious-modes in quartz plates. This method picks up the weak nearby modes by measuring the frequency characteristics of the high-frequency voltages, which are excited at resonant frequencies, at many points on the plate surface. The measured results for two strip AT-cut quartz resonators show that this technique is able to detect very small resonance modes which could not be detected by conventional methods
Keywords :
charge measurement; crystal resonators; vibrations; SiO2; frequency characteristics; high-frequency voltages; plate surface; rectangular quartz plates; resonant frequencies; strip AT-cut quartz resonators; surface charges measurement; very small resonance modes; weak modes detection; weak spurious-modes; Admittance; Couplings; Current measurement; Electrodes; Equations; Frequency measurement; Measurement techniques; Resonance; Resonant frequency; Voltage;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.840820
