Study of Power Amplifier Harmonic Output Termination for two AlGaN/GaN Technologies at K-/Ka-Band

The paper investigates experimentally the effect of harmonic terminations on AlGaN/GaN power amplifiers (PA) performance at K-/Ka-band. Two technologies are compared,a 0.25 µm and 0.1 µm process. In both cases, a harmonic termination increases the achievable output power by about 10 % at the expense of bandwidth, whereas the efficiency is improved only in the first one.