Wave transmission lines and networks – Coupling networks – Delay lines including elastic surface wave propagation means
Patent
1978-12-07
1980-03-04
Smith, Alfred E.
Wave transmission lines and networks
Coupling networks
Delay lines including elastic surface wave propagation means
332 26, 333154, 333166, 333194, 364821, H03H 926, H03H 930, G06G 719, H03C 146
Patent
active
041919335
ABSTRACT:
A surface acoustic wave signal processor having a plurality of taps, each connected to an external nonlinear device are arranged in pairs, each pair having its phase center aligned for interception of propagating waves at the same transversal distance from the launching thereof, the taps having configurations so that each tap in the pair receives signals at a phase which is inverted (180.degree. out of phase) with respect to corresponding signals received at the other tap of the pair, the product mixing output of the external nonlinear device for each tap being summed with the like output for the other tap in the pair, whereby all waves intercepted by the tap pair are cancelled at the product mixer outputs, along with certain of the components of product mixing having odd-ordered exponents. Disclosed configurations include tilted taps with co-propagating waves, longitudinally aligned taps with counter-propagating waves, and co-linear taps with plural channel, transversally displaced waves. Usage with internal mixing is also described.
REFERENCES:
patent: 3634774 (1972-01-01), Carr
patent: 3723916 (1973-03-01), Speiser et al.
patent: 3803395 (1974-04-01), Quate
patent: 3942135 (1976-03-01), Moor et al.
patent: 4016513 (1977-04-01), Solie
patent: 4016514 (1977-04-01), Reeder et al.
patent: 4024480 (1977-05-01), Reeder et al.
patent: 4114116 (1978-09-01), Reeder et al.
Grudkowski Thomas W.
Montress Gary K.
Reeder Thomas M.
Nussbaum Marvin
Smith Alfred E.
United Technologies Corporation
Williams M. P.
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