A Fully Integrated GaN Doherty Power Amplifier for WLAN 802.11ax Application

In this paper, a fully integrated GaN Doherty power amplifier for WLAN 802.11ax application is presented. The output match network is realized by T-type three microline to decrease insert loss and increase efficiency. The PA is fabricated in a 0.25um GaN HEMT technology with a die size of 2.7mm*2mm. The DPA is designed at 6.4~7.2 GHz with a 28V supply voltage. The DPA can obtain a large signal gain over 20dB, >30% DE at 10-dB PBO, an ACPR of -27.7 dBc without DPD, and -52.37 dBc with DPD at an average output power of 27 dBm with a 100 MHz 64-QAM modulation signal.