Title :
K-cut quartz SAW resonators for stable frequency sources
Author :
Takagi, Michiaki ; Momosaki, Eishi ; Yamakita, Makoto ; Oura, Nobunori
Author_Institution :
Div. of Res. & Dev., Seiko Epson Corp., Nagano, Japan
fDate :
3/1/1998 12:00:00 AM
Abstract :
A new type of quartz SAW resonator for use as a stable frequency source has been developed. It was studied from the point of view of frequency instability caused by transient thermal behavior, and a new angle of cut named the K-cut for quartz SAW resonators was found. The static and dynamic frequency temperature coefficients are both zero at a room temperature. Taking into consideration the influence of the electrode-film thickness, the width modes of the waves, and power-flow angles, optimized resonators and oscillators were designed. These devices had frequency stability of 2/spl times/10/sup -10/ for the mean time of 0.01 s.
Keywords :
frequency stability; quartz; surface acoustic wave oscillators; surface acoustic wave resonators; K-cut quartz; SAW resonators; SiO/sub 2/; dynamic frequency temperature coefficients; electrode-film thickness; frequency instability; optimized resonators; power-flow angles; stable frequency sources; static frequency temperature coefficients; transient thermal behavior; width modes; Design optimization; Laboratories; Mobile communication; Oscillators; Resonant frequency; Surface acoustic waves; Temperature distribution; Temperature sensors; Thermal stability; Thermal stresses;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
