gan 78In this paper, a hh-efficiency compact power amplifier is desned and fabricated with a 0.25 μm GaN hh electron mobility transistor (HEMT) to meet the demands of a hhDirector Bi Gan (2nd L), Shu Qi (2nd R), Yi Yangqianxi (1st L) and Huang Jue (1st R) arrive at the red carpet before the premiere of the film Resurrection during the 78th edition of