Design and test of 3 GHz, fundamental mode surface transverse wave resonators on quartz |
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Authors: | Bigler E Gavignet E Ballandras S Denissenko S Cambril E |
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Affiliation: | Lab. de Phys. et Metrol. des Oscillateurs, CNRS, Besancon. |
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Abstract: | 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 mum, 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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