Soluch Waldemar
IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Nov;55(11):2519-21. doi: 10.1109/TUFFC.960.
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.
制作、测量并计算了基于BT切割（-50.5度YX90度）石英的表面横波（STW）二端口异步谐振器。在约332.4 MHz的频率下，插入损耗以及加载和未加载品质因数分别约为11 dB、8000和11500。获得了约20摄氏度的转折温度和约-15 ppb/°C²的二次频率温度系数。与基于AT切割石英（36度YX90度）的STW谐振器相比，该温度系数小约4倍，比基于ST切割的声表面波（SAW）的温度系数小约2倍。基于BT切割石英的STW谐振器和滤波器可用于需要提高温度稳定性的应用中。
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