Patent ID: 7545211

Claim:
A predistortion linearization device with gain and phase expansions to compensate for the gain compression and phase variation of a power amplifier, comprising: first division means comprising an input capable of receiving a microwave input signal and first and second outputs arranged to deliver first and second fractions chosen from said input signal, a first channel connected to said first output in order to be supplied by said first fraction of the input signal, and arranged to generate a first direct current from a first self-biasing of a first diode as a function of said first fraction of the input signal, a second channel connected to said second output in order to be supplied by said second fraction of the input signal, and arranged to carry out gain and phase expansions at a port forming an output from a second self-biasing of at least one second diode as a function of the second fraction of the input signal, and a bias circuit connected to, and supplying with direct voltages, said first and second channels, and arranged to combine, in an opposing manner, the direct voltages and currents originating from the first and second self-biasings of the first and second channels so as to control the shape of the gain and phase expansions of the second channel as a function of the amplitude of the input signal.