www.microwavejournal.com/articles/30705-a-comparison-of-gan-vs-gaas-system-performance
A Comparison of GaN vs. GaAs System Performance
July 16, 2018
Traditionally RF power amplifiers used GaAs technology which has a well behaved and understood performance. Over the past few years GaN technology is replacing GaAs because GaN is more efficient and has a higher power density resulting in higher power MMICs and FETs.