摘要
采用Doherty技术设计并实现了一款应用于无线通信基站的S波段高效率功率放大器,通过非对称功率输入的方式使得整个功放在更宽的功率范围内获得高效率。设计中采用了安捷伦公司的先进设计系统软件(advanced design system,ADS),选取恩智浦公司型号为MRF7S21080H与MRF8S21100H的横向扩散金属氧化物半导体(laterally diffused metal oxide semiconductor,LDMOS)功放晶体管,两款晶体管的工作频率均为2.14～2.17 GHz。经过电路仿真与实物调试,最终设计并实现了功率回退达到7 d B的功率放大器,其增益为13.5 d B,并且在7 d B功率回退点上效率达到35%,峰值功率效率达到42%。相比其他功率放大器,该放大器具有较大的功率回退范围与更高的效率。结果证明,通过不对称输入方式所设计的Doherty功率放大器可以获得更宽的功率回退范围。
This paper designed an S-band high efficiency power amplifier with Doherty technology for base station.The design obtains high efficiency and wide power back-up area by asymmetrical power input.During the design,the advanced design system(ADS)of Agilent company is applied,and the laterally diffused metal oxide semiconductor field effect transistor(LDMOS FET)MRF7S21080H and MRF8S21100H from NXP is adopted.The operating frequency is between2.14GHz and2.17GHz.After the simulation and the test,the power amplifier reaches7dB power back-up area,gets13.5dB gain,the power-added efficiency over35%at the power back off area and over42%at maximum output power.Compared with other power amplifiers,the power amplifier has wider power back off area and higher efficiency.Results show that the Doherty power amplifier using asymmetrical power input can acquire wider power back-up area.
作者
张鑫
王斌
熊梓丞
滕江
ZHANG Xin;WANG Bin;XIONG Zicheng;TENG Jiang(College of Optical and Electronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China)
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2018年第6期783-788,共6页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金(61102026)
重庆邮电大学自然科学基金(A2015-47)~~
