一种对负载不敏感的高功率平衡功率放大器  

A Load Insensitive High-Power Balanced Power Amplifier

作　　者：章国豪 郑耀华[1] 李思臻[1] 林俊明[1] 陈思弟 

机构地区：[1]广东工业大学信息工程学院,广州510006

出　　处：《电子科技大学学报》2016年第3期321-326,共6页Journal of University of Electronic Science and Technology of China

基　　金：广东省领军人才专项资助(400130002);国家自然科学基金(61404032)

摘　　要：针对卫星通信终端，采用功率合成架构设计了一个高输出功率的平衡功率放大器。功率合成架构通过在两路放大器的输出匹配网络中引入土45。的相移，可使该平衡功率放大器具有对负载失配容忍度更高和对负载变化不敏感等特性。该平衡功率放大器采用InGaP／GaAsHBT工艺，工作电压为5v°测试结果表明：在1．5～1．7GHz频段内的增益为32dB左右，饱和输出功率为38dBm，功率附加效率为43％，当负载失配时仍能保持良好的射频特性。A high-output-power balanced power amplifier is designed with power-combining architecture for satellite communication terminals. The power-combining architecture introduces a ＋45° phase shift in the output matching network of two amplifiers, which makes the balanced power amplifier more tolerant to load mismatch and less sensitive to load variation. This balanced power amplifier is implemented with InGaP/GaAs HBT process. Under the band of 1.5 GHz to 1.7 GHz and the supply voltage of 5 V, the measured results show that 32 dB of the gain, 38 dBm of the saturated output power and 43% of power added efficiency （PAE） are achieved, and a good radio frequency performance can be maintained under load mismatch conditions.

关 键 词：高功率 磷化铟镓/砷化镓异质结晶体管 功率放大器 功率合成 卫星通信 

分 类 号：TN927[电子电信—通信与信息系统]