Ku-band linearizer bridge

Details Ku-band linearizer bridge Ku-band linearizer bridge

1996-11-25

1998-08-04

Mottola, Steven

Amplifiers

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

330 43, H03F 126, H03F 358

Patent

active

057899789

ABSTRACT:
A Ku-band integrated pre-distortion type linearizer bridge circuit for use in linearizing the performance of a traveling wave tube amplifier. The linearizer bridge circuit comprises linearizer bridge that embodies a phase shifter and a fixed delay in a linear arm, and a Schottky diode distortion generator and a PIN diode attenuator in a nonlinear arm. The output of the linearizer bridge is coupled through an output amplifier and an output attenuator. The RF output signal from the linearizer bridge circuit is coupled to the traveling wave tube amplifier. A control circuit is coupled to the phase shifter, the nonlinear Schottky diode distortion generator circuit, and the PIN diode attenuator, and receives on and off input command signals, and outputs a bilevel telemetry signal that is used as a mode indicator for ground command control. The control circuit is used to adjust settings of the Schottky diode distortion generator, the phase shifter, the PIN diode attenuator, and adjust the gain and attenuation settings of the output amplifier and output attenuator. All circuits of the linearizer bridge circuit are integrated onto a single alumina substrate.

REFERENCES:
patent: 4752743 (1988-06-01), Phan et al.
patent: 5291148 (1994-03-01), Reisner et al.

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