基于π型谐波控制网络的高效功率放大器设计  

Design of high⁃efficiency power amplifier based onπ⁃type harmonic control network

作　　者：汪雅婷 杨苹 王俊 白天 WANG Yating;YANG Ping;WANG Jun;BAI Tian(PLAC Laboratory,College of Physical Science and Technology,Central China Normal University,Wuhan 430079,China;CICT Mobile Communication Technology Co.,Ltd.,Wuhan 430205,China)

机构地区：[1]华中师范大学物理科学与技术学院PLAC实验室,湖北武汉430079 [2]中信科移动通信技术股份有限公司,湖北武汉430205

出　　处：《现代电子技术》2025年第2期9-13,共5页Modern Electronics Technique

基　　金：国家自然科学基金项目(12075100)。

摘　　要：为了提高通信系统的工作效率,提出一种基于F类理论的π型谐波控制网络。该网络利用直流偏置电路引入二次谐波短路点,从而降低谐波控制电路的复杂度;同时,能够确保二次、三次谐波阻抗不受后续基波匹配电路的影响。为避免寄生参数对晶体管芯漏极阻抗的影响,在π型谐波控制网络与晶体管之间引入L型寄生补偿电路,实现二次谐波阻抗趋近零、三次谐波阻抗趋近无穷大。为验证所设计网络的可行性,设计一款高效率F类功率放大器并进行仿真测试,结果表明在1.8~2.1 GHz工作频带内,饱和输出功率为43.21~44.84 dBm,增益为13.21~14.84 dB,功率附加效率为69.59%~73.54%。由此证明了所提出的π型谐波控制网络在高效率放大器设计中能够很好地满足各项性能指标。In order to enhance the efficiency of the communication system,aπ-type harmonic control network based on class F theory is proposed.In this network,the DC bias circuit is used to introduce second harmonic short-circuit points,thereby simplifying the complexity of the harmonic control circuit.Simultaneously,it can ensure that the second and third harmonic impedance is not affected by the subsequent fundamental wave matching circuit.In order to mitigate the impact of parasitic parameters on transistor core leakage extreme impedance,an L-type parasitic compensation circuit is introduced between theπ-type harmonic control network and the transistor,so as to realize the second harmonic impedance approaching zero and the third harmonic impedance approaching infinity.In order to validate the feasibility of the designed network,a high-efficiency class-F power amplifier is designed and simulated.The results show that within the operating frequency band of 1.8~2.1 GHz,the saturated output power is 43.21~44.84 dBm,the gain is 13.21~14.84 dB,and the power-added-efficiency is 69.59%~73.54%.It confirms that the proposedπ-type harmonic control network can effectively meet performance requirements for the high-efficiency amplifier design.

关 键 词：F类功率放大器 工作效率 π型谐波控制网络 谐波阻抗 L型寄生补偿电路 联合仿真 

分 类 号：TN722-34[电子电信—电路与系统]