GaN MESFETs for high-power andhigh-temperature microwave applications

The potential of microwave GaN MESFETs is evaluated using a harmonic-balance RF simulator for high-power and high-temperature applications. The simulated device performance (DC I/V characteristics and small-signal power gain) of a GaN FET is in good agreement with experimental data. It is demonstrated that the excellent electrical properties of GaN make it a viable alternative to SiC for microwave high-power and high-temperature applications.