K. Riepe et al., HIGH-EFFICIENCY GAINP GAAS HBT MMIC POWER-AMPLIFIER WITH UP TO 9 W OUTPUT POWER AT 10 GHZ/, IEEE microwave and guided wave letters, 6(1), 1996, pp. 22-24
Monolithic power amplifiers using adequately ballasted high-efficiency
GaInP/GaAs heterojunction bipolar transistors (HBT's) have been desig
ned, fabricated, and tested. A maximum output power of 9 W with a powe
r-added efficiency (PAE) of 42% and peak power-added efficiencies of 4
5% have been achieved at 10 GHz under critical long pulse conditions (
pulse width = 100 mu s, duty cycle = 10%). To our knowledge these resu
lts represent the best performance of any GaInP/GaAs HBT MMIC power am
plifier considering efficiency, output power, operation frequency, and
pulse conditions.