Analogue Dynamic Supply Voltage L-band GaN High Power Amplifier with Improvement of Efficiency and Linearity

This paper describes an analogue dynamic gate supply voltage L-band 10W GaN power amplifier which can provide improved efficiency and linearity for two tone and WCDMA signals. The developed analogue dynamic supply voltage method employs an envelope detector and a high speed low power dissipation CMOS level shift converter. The dynamic gate supply voltage is adjusted with the instantaneous input power. This simple method achieved a 6dB reduction in IM3 at 30dBm and 10% improvement of drain efficiency at IM3 of -20dBc.