Emmanuel Bigler, Eric Gavignet, Sylvain Ballandras, Serguei Denissenko, and Edmond Cambril
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--0.5µm, 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.1997 IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 44:399-405
© 1997, by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved.