基于扩展连续B/J类的带宽增强功率放大器设计  

Design of Bandwidth-enhanced Power Amplifer Based on Extended Continuous Class-B/J

作　　者：杨正好 程知群 贾民仕[2] 王坤 钟保全 朱浙鸣 李冰鑫 YANG Zhenghao;CHENG Zhiqun;JIA Minshi;WANG Kun;ZHONG Baoquan;ZHU Zheming;LI Bingxin(College of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;Key Lab of RF Circuit and System,Ministry of Education,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]南京信息工程大学电子与信息工程学院,南京210044 [2]杭州电子科技大学射频电路与系统教育部重点实验室,杭州310018

出　　处：《微波学报》2025年第1期10-15,25,共7页Journal of Microwaves

基　　金：浙江省科技计划项目(2024C01076);科技部基地平台(D20011);陕西省重点研发计划(2023-ZDLGY-49);杭州电子科技大学项目(KYS045624199)。

摘　　要：介绍了一种基于扩展连续B/J类模式的宽带高效率功率放大器的设计。提出了一种带宽增强双路径阻抗匹配技术,将连续的B/J类模式进行扩展,以实现电阻性二次谐波阻抗为设计目标,并与带宽可扩展的双枝节调谐网络相结合,通过同时操纵4个频率点,在宽频段内实现最佳的二次谐波阻抗匹配,从而实现了功率放大器的带宽扩展和效率提高。为了验证所提出的设计理论,设计并制备了一个多倍频程的功率放大器,采用10 W氮化镓高电子迁移率晶体管器件,对设计思想进行了验证。所实现的功率放大器在0.45 GHz~2.55 GHz带宽范围内的相对带宽为140%。带内实现了39.3 dBm~42.4 dBm的输出功率、61.2%~76.7%的漏极效率和9.3 dB~12.4 dB的增益。A design of a broadband high-efficiency power amplifier based on extended continuous class-B/J mode is described in this paper.A bandwidth-enhanced dual-path impedance matching technology is proposed that extends the continuous Class-B/J mode to achieve resistive second harmonic impedance as the design goal,and combines it with a bandwidth-extended dual-branch tuning network.By simultaneously manipulating four frequency points,the best second harmonic impedance matching is achieved in a wide frequency band,thereby achieving bandwidth expansion and efficiency improvement of the power amplifier.In order to validate the proposed design theory,a multi-octave prototype is designed and fabricated,and the design idea is verified by using a 10 W gallium nitride high electron mobility transistor device.The implemented power amplifier has a relative bandwidth of 140%in the 0.45 GHz~2.55 GHz bandwidth range.In addition,an output power of 39.3 dBm~42.4 dBm,a drain efficiency of 61.2%~76.7%,and a gain of 9.3 dB~12.4 dB can be achieved within a wide bandwidth.

关 键 词：扩展连续B/J类 宽带高效率 功率放大器 多倍频程 氮化镓 

分 类 号：TN722.75[电子电信—电路与系统]