Low loss surface acoustic wave device and method

Details Low loss surface acoustic wave device and method Low loss surface acoustic wave device and method

1985-07-19

1986-11-11

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

310313D, 333153, 333194, 333195, H03H 9145, H03H 942, H03H 976

Patent

active

046225250

ABSTRACT:
A surface acoustic wave device in a piezoelectric medium includes input and output transducers for launching and detecting a surface acoustic wave along the piezoelectric medium. The device is arranged in a ring loop to process the bidirectional acoustic wave launched from the input transducer. Multistrip couplers in the ring loop between the input and output transducers are used to achieve low loss characteristics. A phase shift introduced by the multistrip couplers between portions of the surface acoustic wave is used to cancel triple-transit reflections.

REFERENCES:
patent: 4263571 (1981-04-01), Kinoshita et al.
patent: 4309679 (1982-01-01), Furuya et al.
patent: 4521751 (1985-06-01), Riha et al.

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