Surface acoustic wave filter having unidirectional and bidirecti

Details Surface acoustic wave filter having unidirectional and bidirecti Surface acoustic wave filter having unidirectional and bidirecti

1998-11-30

2000-10-03

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333196, 310313B, 310313C, H03H 964

Patent

active

061279048

ABSTRACT:
A surface acoustic wave filter device suitable for CDMA communication system includes a piezoelectric substrate, and a unidirectional input side transducer and a bidirectional output side transducer are formed on the substrate. The filter device has satisfactory filtering characteristics in terms of insertion loss, frequency characteristic, T.T.E. attenuation level, group delay time, etc.

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patent: 5831492 (1998-11-01), Solie
"Technical Handbook for Elastic Wave Devices", pp. 208-209, Nov. 1991, OHM Publishers, Tokyo, Japan.

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