Surface acoustic wave filter

Details Surface acoustic wave filter Surface acoustic wave filter

1979-11-15

1981-04-21

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333154, 333195, H03H 964, H03H 9145, H01L 4116

Patent

active

042635713

ABSTRACT:
A broad-band surface acoustic wave filter of turn reflector type in which the number N of thin film finger or stripe electrode pairs in at least one transducer is selected to satisfy N=F/k.sup.2 to obtain a flat selected band in the frequency response, where F is the constant determined by the material of the used piezo-electric substrate and "k.sup.2 " is the electro-mechanical coupling coefficient.

REFERENCES:
patent: 3886504 (1975-05-01), Hartmann et al.
patent: 4130813 (1978-12-01), Sandy et al.
Sandy et al-"Surface Acoustic Wave Ring Filter", 1976, Ultrasonics Symposium Proceedings, IEEE Cat. No. 76 CH 1120-5 SU, pp. 391-396.

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