A High linearity Power Amplifier with Supplier Sharing Supporting 4096 QAM 802.11be Application

This study introduces a high linearity power amplifiers (PA) supporting 802.11be application. The challenges posed by thermal effects in WLAN PAs are discussed. The power cell's layout is optimized based on thermal-electronic simulation to improve the PA's heat dissipation capability without affecting its electrical performance. To archive supplier sharing, a method is proposed that uses a resonant network to couple the RF power module and bias circuit's power supply, effectively reducing the impact of high-power RF signals on the amplifier's bias and improving the output stability. According to the test result, This work achieves a linear output power of 16.7dBm@EVM<-47dB in the 802.11be MCS13 (4096QAM) 160MHz bandwidth modulation signal under the conditions of the WIFI 5G frequency band, meeting the requirements of 802.11be applications. The gain is greater than 29.8dB across the operating frequency range, and the DPD function optimizes the AM-AM and AM-PM of PA and improve the EVM by 2.5 dB.