基于紧凑型微带谐振单元的大功率高效率小型化功率放大器  

High power and high-efficiency miniaturized power amplifier with compact microstrip resonant cell

作　　者：刘畅[1,2] Liu Chang(School of Microelectronics,Northwestern Polytechnical University,Xi’an 710072 China;Yangtze River Delta Research Institute of Northwestern Polytechnical University,Taicang 215400,China)

机构地区：[1]西北工业大学微电子学院,西安710072 [2]西北工业大学长三角研究院,江苏太仓215400

出　　处：《强激光与粒子束》2023年第10期67-72,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(62201466);太仓市基础研究计划面上项目(TC2021JC29);西北工业大学青年学者研究基金项目(G2022WD01007)。

摘　　要：介绍了大功率高效率功率放大器(功放)在实际设计时面临的晶体管寄生效应问题,并通过引入晶体管封装寄生模型对本征端阻抗进行等效迁移,进而提高了输出匹配网络设计的便捷性。提出一种基于紧凑型微带谐振单元的电路设计方法及其传输线拓扑结构,其中,紧凑型微带谐振单元的作用是提供功放在三次谐波所需的开路点,从而通过调谐传输线满足相应阻抗条件。其优点还包括:基波频率下插入损耗低、效率高;实际物理尺寸小,可满足小型化需求。为了更好地验证上述理论,基于10 W GaN HEMT CGH40010F晶体管和大功率高效率E/F开关类功放在2.2 GHz的工作频率下进行了具体的电路设计。仿真结果表明,该款功放的最大功率附加效率可达78.4%,最大输出功率可达40.1 dBm,功率增益为12.1 dB。This paper presents the problem of the parasitic effect of the transistor for the practical design of high power and high-efficiency power amplifiers(PAs).To solve the problem,we propose a new method:transferring the impedances at the intrinsic plane into those at the package plane with the help of the package model.In this case,the convenience of the design of the output matching network is improved a lot.Moreover,the design methodology of PAs with compact microstrip resonant cell(CMRC)as well as the topology of the transmission-lines(TLs)are also proposed.The CMRC can provide the required open-circuit for the third harmonic.On this basis,the harmonic impedance conditions can be easily realized by the tuning TLs.The insertion loss of the proposed CMRC at the fundamental is low and the physical dimension is relatively small.To verify the feasibility of the proposed circuit,using a 10W GaN HEMT CGH40010F transistor,a switch-mode class E/F PA operating at 2.2 GHz is designed as a prototype.Simulation results show the power-added efficiency of 78.4%,output power of 40.1 dBm,and power gain of 12.1 dB.

关 键 词：功率放大器 大功率 高效率 小型化 寄生效应 紧凑型微带谐振单元 

分 类 号：TN722[电子电信—电路与系统]