GaN/AlGaN MODFET with 80 GHz f max and >100 V gate-drain breakdown voltage

Abstract
The authors report on the characteristics of 0.25 µm gate-length GaN/AlGaN modulation doped field effect transistors grown by MOCVD on sapphire. A record combination of high breakdown voltage (>100 V) and high frequency performance (fT = 27 GHz, fmax = 80 GHz) was achieved, which demonstrates the excellent potential of these devices for microwave power applications.