ABSTRACT State-of-the-art 1.244-GHz surface transverse wave (STW) resonators on AT-cut quartz are characterized. They demonstrate an unloaded Q of 8144 which is as high as 97% of the material Q limit for surface acoustic waves (SAW's). By analyzing the measured data and accounting for the ohmic loss, it is shown that the material Q for STW's on quartz, experimentally obtained from these devices, is at least 37% higher than the material Q for SAW's.
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