This paper by Handel, Tournier, Hartnagel, Mishra, and York examines quantum 1/f phase noise in GaN/AlGaN HFET based oscillators. The work provides a quantum mechanical analysis of phase noise generation in gallium nitride transistor-based oscillators, explaining how fundamental quantum 1/f noise processes in the semiconductor heterostructure translate into close-in phase noise sidebands around the carrier frequency, with implications for synthesizer jitter, receiver sensitivity, and system performance in wireless infrastructure and military electronics.