Adaptive quadrature combining apparatus

Details Adaptive quadrature combining apparatus Adaptive quadrature combining apparatus

1983-01-03

1984-12-25

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330124R, 328163, H03F 132

Patent

active

044906846

ABSTRACT:
A quadrature combiner circuit is provided which employs a quadrature coupler to split an input radio frequency signal into split radio frequency signals which are amplified by respective amplifiers and recombined in a second quadrature coupler in such a manner as to minimize intermodulation distortion products. A feedback loop is employed to assure that the split amplified radio frequency signals incident upon the second quadrature combiner are maintained in quadrature relationship to assure intermodulation product cancellation.

REFERENCES:
patent: 3430156 (1969-02-01), Katzin
patent: 3706946 (1972-12-01), Bickford et al.
patent: 3735266 (1973-05-01), Amitay
patent: 3810018 (1974-05-01), Stover
patent: 3883872 (1975-05-01), Fletcher et al.
patent: 3909743 (1975-09-01), Margala et al.
patent: 3963990 (1976-06-01), Difonzo
patent: 3986123 (1976-10-01), Tirro et al.
patent: 4090137 (1978-05-01), Soma et al.
Microwaves, Nov. 1978, vol. 17, No. 11, p. 97, Phase Loop Stabilizes Class-C Amplifiers.

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