Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1992-04-06
1994-05-17
Nelli, Raymond A.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
333195, 310313B, H03H 900, H03H 964
Patent
active
053131770
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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Hickernell Thomas S.
Penunuri David
Fliegel Frederick M.
Motorola Inc.
Nelli Raymond A.
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