Surface acoustic device having multistrip coupler comprised of a

Details Surface acoustic device having multistrip coupler comprised of a Surface acoustic device having multistrip coupler comprised of a

1983-06-28

1985-11-05

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333153, 310313D, H03H 925

Patent

active

045516952

ABSTRACT:
A surface acoustic wave device comprising a first set of interdigital electrodes that generate surface acoustic waves, a second set of interdigital electrodes that receive and convert surface acoustic waves into electrical signals, and an intermediate electromechanical coupling element provided therebetween. The coupling element comprises a plurality of parallel strips formed on the surface of a piezoelectric substrate such as to receive and change the direction of propagation of the surface acoustic waves, each of these parallel strips being spaced at a predetermined distance from each other and connected therebetween in a given manner to obtain suitable stopband characteristics.

REFERENCES:
patent: 3987379 (1976-10-01), De Vries
patent: 3988703 (1976-10-01), De Vries
patent: 4355290 (1982-10-01), Bagdasarian

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