GaN stuff is also used in the smallest and highest power compact tx power amplifiers in the rf chain for the buc/sspa on two way geostationary satellite termina

GaN stuff is also used in the smallest and highest power compact tx power amplifiers in the rf chain for the buc/sspa on two way geostationary satellite terminals now. Some of the BUCs now are 1/3 the size of 12 years ago. Other small and dense terrestrial microwave and millimeter wave things use gan power amps too.