Surface acoustic wave device improved in convolution efficiency,

Details Surface acoustic wave device improved in convolution efficiency, Surface acoustic wave device improved in convolution efficiency,

1995-09-26

1998-01-13

Lee, Benny

Wave transmission lines and networks

Plural channel systems

Having branched circuits

310313R, 375219, 333193, H03H 964

Patent

active

057084025

ABSTRACT:
A surface acoustic wave device includes a substrate having piezoelectricity, at least two input electrodes, provided on the substrate, for exciting first and second surface acoustic waves, and an output electrode for taking a convolution signal of the two surface acoustic waves out. The substrate has a roughness configuration on a back face thereof and a maximum depth of the roughness configuration is not less than a wavelength of bulk waves of convolution output taken out of the output electrode.

REFERENCES:
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patent: 4163201 (1979-07-01), Takahashi et al.
patent: 4598261 (1986-07-01), Ballato
patent: 5164628 (1992-11-01), Egara et al.
patent: 5200663 (1993-04-01), Mochizuki et al.
patent: 5353304 (1994-10-01), Mochizuki
patent: 5367216 (1994-11-01), Egara et al.
Patent Abstracts of Japan, vol. 015, No. 405 (E-1122), Oct. 1991.
"Surface-acoustic-wave plate convolvers at 1 GHz", Colvin, et al., Applied Physics Letters, vol. 35, No. 7, Oct. 1, 1979.

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