基于改进简化实频技术的超宽带功率放大器设计  

Design of Ultra-wideband Power Amplifier Based on Modified Simplified Real Frequency Technology

作　　者：刘国华[1] 周国祥 郭灿天赐 程知群[1] LIU Guohua;ZHOU Guoxiang;GUO Cantianci;CHENG Zhiqun(Key Laboratory of RF Circuit and System,Ministry of Education,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]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：《电子与信息学报》2021年第6期1617-1621,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(91938201,61871169);浙江省自然科学基金(LZ20F010004)。

摘　　要：该文提出了一种基于改进简化实频算法的跨多倍频超宽带功率放大器。结合负载牵引技术,分析晶体管负载端的最优阻抗值变化。通过改进简化实频法中的优化目标和误差函数,对频段内选取多个频点的最优阻抗进行分析,设计并优化出了功率放大器的输出匹配电路,提高了功放的工作带宽。测试结果显示,在0.5~2.7 GHz频段内,饱和输出功率达到42.5 dBm,饱和漏极效率为64%~75%。A multi-octave power amplifier is proposed based on the improved simplified real frequency method.Combined with the load-pull technology,the optimal impedance of the transistor is analyzed.By improving the optimization objective and error function in the improved simplified real frequency method,the optimal impedance of multiple frequency points in the frequency band is analyzed.The output matching circuit of the power amplifier is designed.The broadband matching circuit is optimized,and the working bandwidth of the amplifier is improved.The test results show that the saturation output power reaches 42.5 dBm and the saturation drain efficiency is 64%~75%within the frequency band of 0.5~2.7 GHz.

关 键 词：功率放大器 简化实频法 多倍频 漏极效率 

分 类 号：TN722[电子电信—电路与系统]