Wave transmission lines and networks – Coupling networks – Delay lines including elastic surface wave propagation means
Patent
1978-08-09
1980-01-01
Smith, Alfred E.
Wave transmission lines and networks
Coupling networks
Delay lines including elastic surface wave propagation means
333195, 364821, 357 26, H03H 926, H03H 930, H03K 5159, H01L 4108
Patent
active
041819047
ABSTRACT:
Two input transducers launch oppositely-propagating acoustic surface waves on a piezoelectric substrate. The waves are compressed to a smaller beamwidth and then laterally confined in a diffused channel waveguide where non-linear interaction occurs at increased energy densities due to the beam compression. In one embodiment the beam compression is accomplished in multistrip couplers. In another embodiment, diffused horn-shaped channels are provided for compressing the beamwidth. Both piezoelectric and semiconductor convolvers are disclosed.
REFERENCES:
patent: 3816753 (1974-06-01), Kino
patent: 3946333 (1976-03-01), Schmidt
Defranould et al., "A Saw Piezoelectric Convolver" in Proceedings of the E, vol. 64, No. 5, May 1976; pp. 748-751.
Kino-"Acoustoelectric Interactions in Acoustic-Surface-Wave Devices", in Proc. of the IEEE, May 1976; pp. 724-738.
Crowley James D.
Giallorenzi Thomas G.
Weller Joseph F.
Daubenspeck William C.
Nussbaum Marvin
Schneider Philip
Sciascia R. S.
Smith Alfred E.
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