Design and characterization of a 6–7 GHz GaAs HBT Doherty power amplifier MMIC for Wi-Fi 6E

This contribution presents a 5-V 1.8-W GaAs HBT Doherty power amplifier MMIC conceived for Wi-Fi 6E applications in the 6-7 GHz band. The paper discusses the solutions adopted, at transistor and amplifier level, to deal with the challenges posed by the demanding design frequency, which is at the limit of the commercially available technologies. The proposed amplifier achieves more than 23 % efficiency in a 5-dB back-off range, as well as good linearity performance when tested with wideband Wi-Fi 6E modulated signals.