FORDISTORDERANDE ANORDNING

摘要

Apparatus for reducing the intermodulation products in active devices such as klystrons, traveling wave tubes and limiters is disclosed. A feedforward control amplitude predistorter which has a characteristic inverse to that of the active device predistorts the amplitude of the input signal to the active device so as to effectively linearize it. A feedforward control phase compensator predistorts the phase of the input signal to the active device so as to compensate for the differential signal phase shift through the active device due to a change in signal input power.