Patent ID: 7899420

Claim:
A wireless transmission device, comprising: a RF power amplification section for amplifying a transmit RF (Radio Frequency) signal and outputting the amplified signal to a transmission antenna; a detector section; and a control section, wherein: the RF power amplification section includes a plurality of stages of amplification; the transmit RF signal is input to an input of a first one of the plurality of stages of amplification; an output of a last one of the plurality of stages of amplification is output to the transmission antenna; the detector section includes: a plurality of detectors provided so as to correspond to the plurality of stages of amplification, each for detecting an input level of a corresponding one of the stages of amplification; and a synthesizer for synthesizing together detection outputs from the plurality of detectors; and the control section controls, in a feedback control, an output level of the RF power amplification section based on an output level of the synthesizer.