STW two-port asynchronous resonator on BT-cut quartz.
A surface transverse wave (STW) 2-port asynchronous resonator on BT-cut (-50.5 degrees YX90 degrees) quartz was fabricated, measured, and calculated. At a frequency of about 332.4 MHz, insertion loss, and loaded and unloaded quality factors of about 11 dB, 8,000, and 11,500, respectively, were achieved. A turnover temperature of about 20 degrees C and a quadratic frequency-temperature coefficient of approximately -15 ppb/degrees C(2) were obtained. Compared with STW resonators on AT-cut quartz (36 degrees YX90 degrees), this temperature coefficient is about 4 times smaller, and about 2 times smaller than that for SAW on an ST cut. STW resonators and filters on BT-cut quartz can be used in applications requiring improved temperature stability.
Soluch
Waldemar
W
D000162:Acoustics / Q000295:instrumentation*; D017076:Computer-Aided Design; D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D011791:Quartz / Q000737:chemistry*; D012542:Scattering, Radiation; D013696:Temperature; D014159:Transducers; D014732:Vibration
D011791:Quartz