Wave transmission lines and networks – Coupling networks – Delay lines including elastic surface wave propagation means
Patent
1981-06-25
1983-04-12
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Delay lines including elastic surface wave propagation means
333153, 310313D, 357 26, H03H 925, H03H 942, H03H 9145
Patent
active
043799981
ABSTRACT:
An acoustic surface wave device is disclosed for generating an output signal that is the phase-conjugate of the input signal to the device. Disposed on the piezoelectric substrate is a first interdigital transducer for receiving a modulated input signal having a carrier center frequency f.sub.1 and for converting the input signal to an input acoustic wave. A semiconductor material is disposed over the surface of the piezoelectric substrate. A second interdigital transducer is disposed on the surface of the piezoelectric substrate between the first interdigital transducer and the semiconductor material. A standing wave at frequency f.sub.1 is generated by counterpropagating pump waves in the nonlinear acoustic wave interaction region in the area of the semiconductor material. The modulated input acoustic wave interacts with the counterpropagating pump waves in the nonlinear interaction region to generate an output signal on the output of the second interdigital transducer that is the phase-conjugate of the input signal.
REFERENCES:
patent: 3634774 (1972-01-01), Carr
patent: 3833867 (1974-09-01), Solie
patent: 3851280 (1974-11-01), Staples
patent: 3882408 (1975-05-01), Auld
patent: 3931509 (1976-01-01), Otto
patent: 4016513 (1977-04-01), Solie
patent: 4181904 (1980-01-01), Weller et al.
Evans Larry W.
Knudsen Herbert D.
Mooney William D.
Nussbaum Marvin L.
The Standard Oil Company
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