A Differential GaN Power Amplifier with <1° AM-PM Distortion for 5G mm-wave Applications

A Differential GaN Power Amplifier with <1° AM-PM Distortion for 5G mm-wave Applications ■

Dongyang Yan, Dongyang Yan, Dongyang Yan, Sehoon Park, Sehoon Park, Sehoon Park, Yang Zhang, Yang Zhang, Yang Zhang, Dries Peumans, Dries Peumans, Dries Peumans, Mark Ingels, Mark Ingels, Mark Ingels, Piet Wambacq, Piet Wambacq, Piet Wambacq

Abstract ■

This paper presents a 0.15μm GaN power amplifier (PA) for 5G applications. The differential two-stage PA contains a high-order interstage matching network for AM-PM distortion compensation without adding any extra active device. The implemented PA achieves a peak power added efficiency (PAEsat) of 25.5\% and saturated output power (Psat) of 32.1dBm at 26GHz. The simulation and measurement results show less than 1 degree AM-PM variation up to Psat across a 24GHz to 30GHz frequency band.