Nonlinear surface acoustic wave PSK encoder/correlator

Details Nonlinear surface acoustic wave PSK encoder/correlator Nonlinear surface acoustic wave PSK encoder/correlator

1976-04-14

1978-01-24

Lieberman, Eli

Wave transmission lines and networks

Coupling networks

With impedance matching

333 70T, 333 72, 364821, H03H 728, H03H 926, H03H 902, H03H 932

Patent

active

040706389

ABSTRACT:
A surface acoustic wave (SAW) tapped delay line, including a piezoelectric substrate having a pair of signal launching transducers disposed thereon for providing surface acoustic waves in the substrate in response to electrical signals applied thereto, and including a plurality of transducer taps disposed in an interaction region of the substrate for providing a plurality of sensed electrical signals in response to the surface acoustic waves propagating through the interaction region, the plurality of sensed electrical signals including signals at the frequency of each of the acoustic waves, is combined with a plurality of nonlinear frequency mixers, each responsive to a corresponding one of the transducer taps, and each providing signal manifestations of the sum and difference frequency of the surface acoustic waves in a selected one of two phases which are displaced by 180.degree. with respect to each other, the combination of the SAW tapped delay line and plurality of selective phase nonlinear frequency mixers providing a programmable phase, nonlinear surface acoustic wave PSK encoder/correlator.

REFERENCES:
patent: 3851280 (1974-11-01), Staples
patent: 3942135 (1976-03-01), Moor et al.
Reeder et al., "Convolution and Correlation by Nonlinear Interaction in a Diode-Coupled Tapped Delay Line" Appl. Phys. Lett., Jan., 1973; pp. 8-10.
Hunsinger et al., "Programmable Surface-Wave Tapped Delay Line" IEEE Trans. on Sonics and Ultrasonics, July 1971; pp. 152-154.

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