Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1981-03-03
1983-06-28
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
333196, H03H 964, H03H 9145
Patent
active
043908543
ABSTRACT:
A broad bandwidth surface acoustic wave filter utilizing two broadband surface acoustic wave transducer pairs which individually comprise a single input and output. One pair of broadband surface acoustic wave (SAW) transducers is offset in frequency from a second pair of broadband SAW transducers. Each transducer is tuned with a single series inductor, and then both channels are connected electrically in parallel. The low frequency pair of transducers is tuned for maximum response below their synchronous frequency, and the high frequency pair of transducers is tuned for maximum response above their synchronous frequency.
REFERENCES:
patent: 3522557 (1970-08-01), Duncan et al.
patent: 3858118 (1974-12-01), Daniel
patent: 3942140 (1976-03-01), Laker et al.
"Monolithic Saw Mixer With Single Sideband Output", R. D. Colvin, Paul H. Carr, E. J. Charlson, 1978 IEEE Ultrasonics Symp. Proc. pp. 724-727.
"Stagger Tuning of Saw Filters for Broad Bandwidth and Good Shape Factor", R. D. Colvin, Paul H. Carr, G. A. Roberts, E. J. Charlson, IEEE Trans. Sonics & Ultrasonics, submitted Jan. 7, 1981.
Nussbaum Marvin L.
Singer Donald J.
Stepanishen William
The United States of America as represented by the Secretary of
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