基于GaAsHBT的C波段RLC负反馈功率放大器设计  

Design of C-Band RLC Negative Feedback Power Amplifier Based on GaAs HBT

作　　者：傅海鹏 姚攀辉 FU Haipeng;YAO Panhui(School of Microelectronics,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学微电子学院,天津300072

出　　处：《湖南大学学报（自然科学版）》2024年第8期101-108,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(62074110);国家重点研发计划资助项目(2018YFB2202500)。

摘　　要：提出了一款基于GaAs HBT C波段的线性负反馈功率放大器(power amplifier,PA).本设计采用三级共发射极(common emitter,CE)结构,使用两种不同的有源线性偏置来提升PA的线性度,同时使用RLC负反馈网络来提高稳定性和拓展工作带宽.针对传统的负反馈网络结构PA的增益下降问题,RLC负反馈网络可以通过调整负反馈网络中的电感值来有效减小负反馈带来的增益下降的影响.测试结果表明:室温下,在5.1~7.4 GHz范围内,实现增益大于28 dB.在5.9~7.1 GHz的线性工作频段内,平均增益大约为29.5 dB,S11和S22均小于-10 dB;在满足无线局域网标准802.11a,采用20 MHz 64-QAM信号,EVM达到-30 dB的输出功率为18.9~22.5 dBm.在5.9~6.2 GHz时,饱和输出功率大于30 dBm,最大的附加功率效率大于35%.A linear negative feedback power amplifier(PA)based on gallium arsenide(GaAs)heterojunction bipolar transistor(HBT)in the C-band is proposed.The design employs a three-stage common emitter(CE)structure and utilizes two different active linear biases to enhance the linearity of the PA.Simultaneously,an RLC negative feedback network is incorporated to improve stability and broaden the operational bandwidth.Addressing the issue of gain reduction in traditional feedback network structures,the RLC negative feedback network can effectively mitigate the impact of gain reduction induced by feedback by adjusting the inductance values within the feedback network.Test results demonstrate that,at room temperature,within the frequency range of 5.1 GHz to 7.4 GHz,a gain exceeding 28 dB is achieved.In the linear operating frequency range of 5.9 GHz to 7.1 GHz,the average gain is 29.5 dB,and both S11 and S22 are less than-10 dB.Complying with the wireless LAN standard 802.11a,a 20 MHz 64-QAM signal is utilized and the output power achieving an EVM of-30 dB ranges from 18.9 dBm to 22.5 dBm.Between 5.9 GHz and 6.2 GHz,the saturated output power exceeds 30 dBm,and the maximum power added efficiency(PAE)is greater than 35%.

关 键 词：功率放大器 负反馈 异质结双极晶体管(HBT) 

分 类 号：TN752[电子电信—电路与系统]