关键词: GaN, Doherty, 内匹配

Abstract: In wireless communication systems, the power amplifier is not only the largest device in the transmitter, but also the device with the highest power consumption. To meet the requirements of small size and high efficiency for power amplifier in communication system, an internal matched Doherty power amplifier based on GaN technology is introduced. The amplifier operates at a frequency of 3.4-3.6 GHz, with a saturated output power up to 47 dBm and a power-added efficiency greater than 55%. When output power is backed off by 4.5 dB, the power-added efficiency is above 52%. The power amplifier is designed with internal matched technology, which can effectively reduce the size, and the package dimension is 30.8 mm×27.4 mm.

Key words: GaN, Doherty, internal matched