Operating point-stabilized linearized traveling wave tube amplif

Details Operating point-stabilized linearized traveling wave tube amplif Operating point-stabilized linearized traveling wave tube amplif

1986-06-20

1987-10-20

LaRoche, Eugene R.

Amplifiers

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

330 43, 330284, 328163, H03F 133

Patent

active

047017171

ABSTRACT:
A traveling wave tube transmission amplifier arrangement, including the series connection of a predistortion circuit, a preamplifier with limiter circuit and a traveling wave tube amplifier, which is provided with several stabilizing circuits. To limit the output power, a signal which is a measure of the output power of the traveling wave tube, e.g., a signal proportional to the collector current of the traveling wave tube, is fed to a threshold controller which governs a variable attenuator provided at the input of the transmission amplifier arrangement. Moreover, to provide compensation for aging effects, a remote control signal, which is determined on the basis of an intermodulation measurement, is fed to the preamplifier with limiter circuit.

REFERENCES:
patent: 4329655 (1982-05-01), Nojima et al.
G. Satoh et al., "Nonlinear Satellite Channel Design for QPSK/TDMA Transmission", 5th International Conference of Digital Satellite Communications, Mar. 23-26, 1981, Genoa, Italy, pp. 1-8.

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