Surface wave convolver apparatus

Details Surface wave convolver apparatus Surface wave convolver apparatus

1975-12-04

1977-04-05

Church, Craig E.

Wave transmission lines and networks

Coupling networks

With impedance matching

235181, 330 55, 333 72, H03H 926, H03H 930, G06G 719, H03F 700

Patent

active

040165132

ABSTRACT:
Apparatus for convolving acoustic surface waves without dispersion comprising a piezoelectric substrate having surface acoustic waves generated at opposite ends thereof and directed towards an interaction region formed from a semiconductor film deposited thereon. The film is deposited on the substrate at such an angle with respect to the direction of propagation of each of the two acoustic surface waves so that the dispersive components of the wave vectors associated with the surface acoustic waves refracted in the interaction region substantially cancel. Apparatus is also disclosed for substantially eliminating undesired wave reflections in a convolver operating in the degenerate mode wherein a conductive array of electrode fingers is disposed at an angle with respect to the direction of propagation of the acoustic surface waves such that the reflections therefrom are directed away from the paths traversed by said acoustic surface waves.

REFERENCES:
patent: 3816753 (1974-06-01), Kino
patent: 3833867 (1974-09-01), Solie
patent: 3851280 (1974-11-01), Staples

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