Method and apparatus for an acoustic wave filter
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United States of America Patent
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May 17, 1994
Grant Date -
N/A
app pub date -
Apr 6, 1992
filing date -
Apr 6, 1992
priority date (Note) -
Expired
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Abstract
A low-loss acoustic wave filter includes a piezoelectric substrate, a first strongly unidirectional acoustic wave transducer and a second strongly unidirectional acoustic wave transducer. Each of the first and second strongly unidirectional acoustic wave transducers are acoustically coupled to one another. Each of the first and second strongly unidirectional acoustic wave transducers further comprises an acoustic wave reflector and a weakly unidirectional acoustic wave transducer. The acoustic wave reflector and the weakly unidirectional acoustic wave transducer are coupled to the piezoelectric substrate.
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