Broadband high-efficiency HBT MMIC power amplifier fabricated with re-aligned process

Design Considerations for High Efficiency GaAs HBT MMIC Power Amplifiers

“…The output power performance of the HBT is limited more by thermal considerations than by electrical ones [1][2][3][4]. recent years [5][6][7][8][9][10][11][12][13]. HBT power amplifiers exhibiting PAE in excess of 38% over 6-18 GHz band [14], 40% over [8][9][10][11][12][13][14] [15,16], 58% over 5-10 GHz band [17], and output power over 12 Watts in the X-Band [18] have been reported.…”