the power combiner 17 and adjusting the amplitude control 24 and the phase control 28 the inputs signal to the port n and to the port o can be added with the same amplitude but with 180 u00b0 different phase angles this results in the output at the port q of a signal consisting mainly of the distorted components the normal signal element being weak if the coupling between the ports n and p is approximately one and the coupling between the ports n and q is sufficiently low the majority of the input to the port n will be outputted from the port p the output from the port q mainly the distorted component is transferred to the port s of the power combiner 18 via the amplitude control 25 phase control 29 and auxiliary amplifier 21 where it is amplified while the output from the port p the normal signal and the distortion component is inputted to the port r of the power combiner 18 through the delay line 33 by suitably setting the coupling of the power combiner between the ports r and t and between the ports s and t and adjusting the amplitude control 25 and the phase control 29 the distortion components to the port r and to the port s have the same amplitude but 180 u00b0 phase differences this produces an output signal with the distortion components sufficiently canceled and suppressed that is the.