Surface-propagating acoustic wave device

Details Surface-propagating acoustic wave device Surface-propagating acoustic wave device

1985-05-24

1987-04-21

Budo, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

333153, 333195, H01L 4108

Patent

active

046599550

ABSTRACT:
In a surface acoustic wave device which includes a relfective multistrip coupler (4, 4'), direct electrical breakthrough resulting from the adjacent location of the input and output transducers (2, 3) is reduced by including at least one forward multistrip coupler (24,25) in each path coupling the transducers (2,3) via the reflective couplers (4,4') so as to space the transducers (2,3) from one another. In a so-called low-loss device in which both ends of the transducers (2,3) are reflectively coupled, the arrangement enables the input/output track separation (23) of the reflective couplers to be reduced thereby significantly reducing the insertion loss of the device.

REFERENCES:
patent: 4155056 (1979-05-01), Cross et al.
patent: 4350963 (1982-09-01), Iwamoto et al.
patent: 4567453 (1986-01-01), Schofield
patent: 4591818 (1986-05-01), Schofield

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