Title :
Electronic desensitization of resonators to accelerations
Author :
Ballato, A. ; Kosinski, J. ; Lukaszek, T. ; Mizan, M. ; McGowan, R.
Author_Institution :
US Army Electron. Technol. & Devices Lab., Fort Monmouth, NJ, USA
Abstract :
A compensation technique to electronically reduce the acceleration sensitivity, gamma, in crystal resonators is presented. Tests performed on both bulk acoustic wave (BAW) and surface acoustic wave (SAW) resonators are described. For devices where the mode shape would not be expected to change very much with frequency adjustment, e.g. SAW delay lines, changes in the sensitivity coefficient are minimal. Some representative examples of the SAW devices tested are shown. A portion of the change in the gamma coefficient is shown to be a structure resonance, but the mode shape change is large. A twenty-fold improvement in gamma with electronic tuning is shown. It is possible to design resonators of each type so that the mode shape is more sensitive to frequency offsets to maximize the effect
Keywords :
crystal resonators; frequency stability; surface acoustic wave devices; BAW resonators; SAW delay lines; SAW devices; SAW resonators; acceleration sensitivity; bulk acoustic wave; compensation technique; crystal resonators; electronic desensitization of resonators; electronic tuning; frequency adjustment; frequency offsets; gamma; gamma coefficient; mode shape change; sensitivity coefficient; sensitivity to accelerations; structure resonance; surface acoustic wave; Acceleration; Acoustic testing; Acoustic waves; Delay lines; Frequency; Performance evaluation; Resonance; Shape; Surface acoustic wave devices; Surface acoustic waves;
Conference_Titel :
Frequency Control, 1990., Proceedings of the 44th Annual Symposium on
Conference_Location :
Baltimore, MD
DOI :
10.1109/FREQ.1990.177530
