Patent ID: 7054597

Claim:
A transmitter comprising: a modulator providing a phase-modulated constant-envelope radio-frequency signal; a dividing unit dividing a signal provided by said modulator into a first signal and a second signal which are identical to each other; a first processing branch for processing a respective first signal provided by said dividing unit, said first processing branch comprising a first phase shifter and a first power amplifier connected to each other in series; a second processing branch for processing a respective second signal provided by said dividing unit, said second processing branch comprising a second phase shifter and a second power amplifier connected to each other in series; a combining unit combining signals provided by said first and said second processing branch; a first control arrangement for controlling the power of a signal output by said combining unit at least for higher power levels by controlling the amplifications applied by said first power amplifier and by said second power amplifier to a respectively received signal; and a second control arrangement for controlling the power of a signal output by said combining unit at least for lower power levels by controlling the phase shifts applied by said first phase shifter and by said second phase shifter to a respectively received signal.