Design and test of 3 GHz, fundamental mode surface transverse waveresonators on quartz
Bigler, E.; Gavignet, E.; Ballandras, S.; Denissenko, S.; Cambril, E.
Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on
Volume 44, Issue 2, Mar 1997 Page(s):399 - 405
Digital Object Identifier   10.1109/58.585124
Summary:Surface transverse wave (STW) resonators, based on the propagation of high velocity shear horizontal waves on Y-rotated quartz were designed, fabricated and tested. A model is presented to predict the resonant frequency of a 3-grating structure as a function of design parameters such as periodicities, metal thickness, and finger-to-gap ratio. Experimental devices have been fabricated by direct e-beam lithography with linewidth geometries in the range of 0.3-0.5 μm, and an operating frequency close to 3 GHz in fundamental mode. Two different designs using either a quasi synchronous structure (type 1) or a change of periodicity inside the cavity (type 2) were tested. The best experimental factor of merit is close to the best results already published for quartz STW resonators

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