Interdigital transducer for use in a surface acoustic wave filte

Details Interdigital transducer for use in a surface acoustic wave filte Interdigital transducer for use in a surface acoustic wave filte

1993-01-26

1994-09-06

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313C, H01L 4108

Patent

active

053451350

ABSTRACT:
An interdigital transducer for use in a surface acoustic wave filter has two busbars of an irregular shape to reduce the effect of internally reflected surface waves. The busbars will usually have an identical shape to one another and have stepped outer and inner edges. The distance between a portion of the outer edge and a corresponding portion of the inner edge can be constant for a particular busbar or that distance can vary. With previous busbars, the outer and inner edges are linear and each busbar has a rectangular shape.

REFERENCES:
patent: 4144508 (1979-03-01), Lewis et al.
patent: 4322651 (1982-03-01), Inoue et al.
patent: 4406964 (1983-09-01), Chiba et al.
patent: 4575653 (1986-03-01), Sinha
patent: 4999535 (1991-03-01), Mariani et al.

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