A parallel power amplifier with a novel mode switching control

作者：Han Kichon^*; Kim Bumman

来源：IEEE Microwave and Wireless Components Letters, 2008, 18(3): 200-202.

DOI：10.1109/LMWC.2008.916813

• back-off power operation
• mode switching
• power amplifier (PA)
• power-added efficiency (PAE)

Two parallel operating power amplifiers (PAs) are controlled by a novel mode switch for high efficiencies at both the back-off power region and high power region. The mode switch is realized by the base-collector (BC) junction diode which reuses the dc current of the low power mode amplifier. A 836 MHz CDMA PA has been demonstrated using InGaP/GaAs heterojunction bipolar transistor with fully integrated matching component for small package and low cost. It shows a 13 mA idle current, 15.4% power added efficiency (PAE), -48 dBe ACPR1 at 16 dBm of the low power mode operation and a 40.5% PAE, -46 dBc ACPR1 at 28 dBm of the high power mode operation.

• 出版日期2008-3