Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1995-08-28
1997-06-03
Lee, Benny
Wave transmission lines and networks
Coupling networks
Electromechanical filter
333194, 333193, 310313R, 310313D, H03H 900, H03H 964
Patent
active
056358830
ABSTRACT:
An acoustic wave filter (200, 300) having a substrate for supporting propagation of acoustic waves, and first (220, 315), second (235, 330) and third (210, 310) acoustic wave transducers disposed on the substrate. The first acoustic wave transducer (220, 315) includes at least one bus bar (221, 316) electrically coupled to a first electrical port (205, 305) of the acoustic wave filter (200, 300). The second acoustic wave transducer (235, 330) is disposed on the substrate in line with the first acoustic wave transducer (220, 315) and is acoustically coupled thereto. The second acoustic wave transducer (235, 330) includes at least one bus bar (236', 331) electrically coupled to a second electrical port (240, 345) of the acoustic wave filter (200, 300). The third acoustic wave transducer (210, 310) includes at least one bus bar (211, 311') electrically coupled to the first electrical port (205, 305). The third acoustic wave transducer (210, 310) is acoustically decoupled from either the first (220, 315) or second (235, 330) acoustic wave transducers.
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Cho Frederick Yi-Tung
Hickernell Thomas S.
Penunuri David
Fliegel Frederick M.
Gambino Darius
Lee Benny
Motorola Inc.
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