DOHERTY POWER AMPLIFIER AND IMPLEMENTATION METHOD THEREFOR

摘要

The present invention discloses a Doherty power amplifier and an implementation method thereof. A peak amplifying circuit of the Doherty power amplifier comprises a radio frequency switching circuit configured to control turn-on of the peak amplifying circuit; wherein a last stage carrier amplifier of a carrier amplifying circuit of the power amplifier uses a HVHBT device, and a last stage peak amplifier of the peak amplifying circuit of the power amplifier uses a GaN device. The present invention avoids the shortcoming when the peak branches in the Doherty power amplifier are turned on ahead of time, decreases power consumption of the peak amplifier and improves the batch efficiency of the whole Doherty power amplifier.