Bulk acoustic wave signal processing devices
OwnerDaniel E. Oates, Peter V. Wrightinventors
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Abstract
An acoustic wave signal processing device which in a preferred embodiment utilizes at least one holographic grating formed within a portion of the interior of a substrate which is capable of supporting the propagation of bulk acoustic wave signals therein. The grating provides spatially varying acoustic impedances within the substrate and interacts with bulk acoustic wave signals propagated therethrough so as to produce output acoustic wave signals. The grating and transducers for producing and receiving the input and output bulk acoustic wave signals, respectively, can be arranged to provide a variety of signal processing operations which may be desired, such as providing resonating operations and filter operations, for example.
Claims23
An acoustic wave signal processing device comprising
- a crystal substrate capable of having bulk acoustic wave signals propagated through the interior thereof;
- transducer means mounted on at least one selected surface of said crystal substrate for producing and receiving bulk acoustic wave signals which are propagated through the interior of said crystal substrate;
- and
- a portion of the interior of said substrate having a plurality of generally spatially periodic regions formed therein said regions being formed so that the acoustic impedance characteristics of said regions vary spatially in a periodic fashion from region to region such that a bulk acoustic wave signal transmitted through said regions interacts differently with each of said regions during its transmission through said regions.
Dependencies are inferred from the claim text.