Patent ID: 9048807
Filing Date: 2015-06-02
Classification: H03H

Abstract:
1. A surface acoustic wave resonator for use in high temperature applications comprising: a piezoelectric substrate; at least one interdigital transducer supported by the piezoelectric substrate; and one or more grating reflectors supported by the piezoelectric substrate, the grating reflector being fabricated of a heavy metal and comprising a plurality of electrodes, at least one electrode of the plurality of electrodes being electrically isolated from at least one other electrode of the plurality of electrodes, wherein the at least one interdigital transducer, upon excitation, generates one or more surface acoustic wave and receives one or more reflected surface acoustic wave corresponding to the one or more surface acoustic wave having been reflected from the one or more grating reflectors, and wherein the interdigital transducer operates in conjunction with one or more grating reflectors to filter out one or more spurious transverse modes associated with the reflection of the surface acoustic wave with the one or more grating reflectors.