Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1990-10-10
1993-04-13
Dzierzynski, Paul M.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
333133, 310313R, H03H 964
Patent
active
052026523
ABSTRACT:
A surface acoustic wave device is disclosed for use in a communication apparatus where the surface acoustic wave device has a multiple of surface acoustic wave elements with different filter characteristics formed on mutually distinct piezoelectric substrates. The different filter characteristics combine to form filters having desired filter characteristics.
REFERENCES:
patent: 4468642 (1984-08-01), Hikita
patent: 4733122 (1988-03-01), Shinonaga et al.
patent: 4803449 (1989-02-01), Hikita et al.
Horine, B. H., "Saw Resonator Filters: Applications and Capabilities," 1985 IEEE-MTT-S International Microwave Symposium Digest, pp. 247-250, Jun. 1985.
Hikita Mitsutaka
Hirashima Tetsuya
Shibagaki Nobuhiko
Tabuchi Toyoji
Dzierzynski Paul M.
Ham Seung
Hitachi , Ltd.
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