摘要
提出了一种具有串、并联负反馈网络的有源预失真电路,对其工作原理进行了分析。基于AWR Microwave Office软件的仿真结果表明:该预失真电路能够产生增益扩展与负相位偏差,可将其用于补偿功率放大器后级电路产生的增益压缩和正相位偏差,提高功放的线性度。将该预失真电路作为输入级设计了一款功率放大器,并基于截止频率为29.5 GHz的2μmInGaP/GaAs HBT工艺成功流片,测试结果表明:在3.5 V偏置电压下、1.5～1.8 GHz频段范围内,功放的功率增益可达27dB,P1dB为28 dBm,最大功率附加效率为36%。
An active pre-distortion circuit with two feedback networks is designed.The simulation results based on AWR Microwave Office show that this pre-distortion circuit can achieve a gain expansion and a negative phase deviation which can compensate the gain compression and positive phase deviation of the following stages.A power amplifier with this pre-distortion circuit is designed and fabricated based on 2 μm InGaP/GaAs HBT technology whose cut-off frequency is 29.5 GHz.The measurement results show that over the frequency range from 1.5 to 1.8 GHz,its power gain can reach up to 27 dB with 28 dBm at 1 dB gain compression point,and the maximum power added efficiency comes up to around 36% with supply voltage of 3.5 V.
出处
《电子器件》
CAS
2010年第5期568-571,共4页
Chinese Journal of Electron Devices
关键词
负反馈网络
预失真
功率放大器
negative feedback network
pre-distortion
power amplifier
作者简介
胡善文（1985-），男，安徽安庆人，东南大学在读博士研究生，主要研究方向为单片微波集成电路设计；
高怀（1961-），男，江苏苏州人，东南大学博士生导师，IEEE高级会员，主要研究方向为高频高功率器件及单片微波集成电路设计。
