Elastic surface wave device

Details Elastic surface wave device Elastic surface wave device

1978-06-20

1980-05-06

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

310313, 333154, 333194, 333196, H03H 904, H03H 926, H03H 932, H03H 930

Patent

active

042019648

ABSTRACT:
To eliminate disturbance signals caused by the reflection from the unitary stem areas of comb-like electrodes of an interdigital transducer in an elastic surface wave device, the edges of the unitary stem areas perpendicular to the surface wave propagating direction includes at least one pair of partial edges, the positions of the partial edges in each of the at least one pair of partial edges differ by (2n+1).multidot..lambda./4 from each other in the surface wave propagating direction, and the lengths of the partial edges in the each pair are equal to each other, where n represents zero or a positive integer and .lambda. represents the wavelength of the elastic surface.

REFERENCES:
patent: 3955159 (1976-05-01), Mitchell et al.
patent: 4030050 (1977-06-01), Deacon et al.

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