Closed loop RF power amplifier output correction circuit

Details Closed loop RF power amplifier output correction circuit Closed loop RF power amplifier output correction circuit

1991-01-10

1992-03-31

Barron, Jr., Gilberto

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By monitoring

342368, 330107, 330295, G01S 740, H01Q 336, H03F 132, H03F 324

Patent

active

051012111

ABSTRACT:
A closed loop RF power amplifier output correction circuit is disclosed, for providing closed loop continuous amplitude and phase correction of solid state amplifiers. The circuit includes a two channel RF solid state high power amplifier whose inputs are fed through two control phase shifters and whose outputs are combined in a hybrid junction. A reference signal is provided, which the power amplifier must duplicate in amplitude and phase. A coupling and comparision circuit compares the reference signal and the amplifier output signal and provides an error signal representative of error power. Digital circuitry is provided which takes only relative error power measurements and nulls the error by adjusting the control phase shifters in a closed loop.

REFERENCES:
patent: 3735288 (1973-05-01), Strauss
patent: 4600892 (1986-07-01), Wagner et al.
patent: 4794343 (1988-12-01), Yang
patent: 4985686 (1991-01-01), Davidson et al.
patent: 5008844 (1991-04-01), Kyriakos et al.
Vaccaro et al., "Product Design of a High-Power S-Band MIC Module for Phased Arrays", IEEE Trans Microwave Theory and Techniques, MTT-19, No. 7, pp. 604-616, Jul. 71.
Hoft et al., "Solid State Transmitters", Electronic Progress, vol. 17, No. 2, pp. 25-33, Summer 75, Raytheon Company.

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