Gain control method for radio frequency power amplifier
A gain control, radio frequency power technology, applied in the field of radio frequency front-end, can solve the problems of linearity index change of radio frequency power amplifier, impedance mismatch between radio frequency power amplifier and radio frequency transceiver, etc., to achieve the effect of ensuring performance consistency
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[0023] Such as figure 2 Shown is the structure of the RF power amplifier proposed by the present invention, the RF signal from the system RF transceiver is from the port IN The input is input to the input terminal of the active device of the power amplifier through the sequentially cascaded gain control unit and input matching network. After single-stage or multi-stage power amplification of the active device, the radio frequency signal is output to the output port through the output matching network. out . The input matching network matches the input impedance of the active device to the characteristic impedance value of the radio frequency system, generally 50 ohms; the output matching network realizes the best power output required to match the characteristic impedance value of the radio frequency system to the output terminal of the active device impedance. Active devices in RF power amplifiers, powered by power VCC powered, and is biased by the signal Vbias Provid...
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