高效率双频连续F类功率放大器的设计  

Design of high efficiency dual-band continuous class F power amplifier

作　　者：王帅[1] 段亚朋 毋皓 安万通 李晓明 WANG Shuai;DUAN Yapeng;WU Hao;AN Wantong;LI Xiaoming(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,Henan Province,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《电子元件与材料》2023年第1期88-95,共8页Electronic Components And Materials

基　　金：河南省高等学校重点科研项目资助(17A510002)。

摘　　要：为满足多标准和多频段无线通信的需求,针对特定频段如何提高效率问题,基于连续F类功放的谐波控制理论,提出了一种高达三次谐波控制的双频功放设计方法,实现了两个频段的高效率性能。首先,分析了电流源平面的各次谐波阻抗,基于连续F类阻抗设计空间的灵活性,设计的双频谐波控制网络将二次谐波控制在短路点附近,同时将三次谐波控制在开路点附近,可提高任意两个频段功放的效率。随后,针对传统耦合器基频匹配网络在多频匹配方面的不足,提出了改进的双频阻抗匹配网络,简化了匹配方法并实现了不同频点的最佳基波阻抗同时匹配到标准的50Ω。最后,使用Cree公司的CGH40010F GaN HEMT设计了一款工作在1.8和2.6 GHz的双频连续F类功率放大器,并进行测试,结果显示在1.8和2.6 GHz的饱和输出功率分别为40.6 dBm和39.5 dBm,最大功率附加效率分别为75.4%和74%,最大漏级效率均大于75%。测试结果表明,所提出的双频谐波控制网络设计方法在提高功放效率方面具有显著优势。A design was presented for a highly efficient dual band continuous class F power amplifier, which was suitable for multi standard and multi band wireless communication. Based on the harmonic control theory of continuous class F power amplifier, a harmonic control method up to third order was proposed for dual frequency power amplifier, which could improve the efficiency of the power amplifiers in any two frequency bands. Thanks to the flexibility provided by the continuous class F impedance design space, a dual band harmonic control network was designed to locate the second harmonic near the short circuit point and the third harmonic near the open circuit point. To overcome the shortcomings of the traditional coupler fundamental frequency matching network, an improved dual frequency impedance matching network was proposed. The impedance matching network simplified the matching method considerably and realized the best fundamental impedance to match the standard 50 Ω at each operating frequency simultaneously. For verification, a dual-band continuous class F power amplifier working at 1.8 GHz and 2.6 GHz was designed and tested by using CGH40010F GaN HEMT of Cree company. The results show that the saturated output power at 1.8 GHz and 2.6 GHz are 40.6 dBm and 39.5 dBm respectively, the maximum power added efficiency are 75.4% and 74% respectively, and the maximum drain efficiency is greater than 75%. This method has significant advantages in improving the efficiency of dual band power amplifier.

关 键 词：连续F类 双频功放 双频谐波控制 双频基波匹配 高效率 功率附加效率 漏级效率 

分 类 号：TN722.5[电子电信—电路与系统]