| 摘要 |
The present invention discloses a Doherty power amplifier and an implementation method thereof. The Doherty power amplifier includes a carrier power amplifier circuit and a peak power amplifier circuit, wherein, the peak amplifier circuit is configured with a Radio Frequency (RF) switch for controlling turn-on of peak power amplifiers in the peak amplifier circuit; and a part or all of carrier power amplifiers in the carrier power amplifier circuit use GaN devices, and a part or all of the peak power amplifiers in the peak power amplifier circuit use LDMOS devices. The present invention avoids a defect of a peak branch in the Doherty power amplifier from being turned on ahead of time, thus reducing the power consumption of the peak power amplifier; and meanwhile, since the power consumption of the carrier power amplifiers in the Doherty power amplifier account for most of the power consumption, and the efficiency of the carrier power amplifiers using GaN devices is much higher than that of the carrier power amplifiers using LDMOS devices, the efficiency of the whole power amplifier is greatly enhanced. |
