摘要
近年来随着5G基站的全面投入使用,针对S波段功率放大器的各项指标又提出了更高的应用需求。为了满足高增益,高效率,宽频带、大功率、小型化等需求,本文在阶跃式匹配电路的基础上,采用并联开路微带线的方法,设计了一款工作在3.4~3.6 GHz的射频功率放大器。本次设计所采用的设计方法解决了晶体管动态阻抗难以精确测试,仿真与实测存在差距等问题。在本设计中,输入输出匹配网络采用并联开路微带线并且通过改变开路微带线的物理长度与宽度,使匹配网络处于动态匹配状态,有利于后期调试电路,从而确定最佳匹配电路。同时,微带线的采用使得整个电路更加小型化。为验证方案的可行性,本文采用了CREE公司的CGHV40030F晶体管设计了一款工作在3.5 GHz的射频功率放大器,并进行硬件制作与测试。仿真与测试结果均表明,该设计方法易于电路调试,便于准确地确定匹配网络,实测结果逼近仿真结果,幅度失真小于1,相位失真小于5°/dB,S11小于-5.1 dB,S12大于18.3 dB,输出功率大于45 dB,增益大于12 dBm,漏极效率大于66%等各项性能指标良好。
In recent years,with the full use of 5G base stations,higher performance of the S-band power amplifier has been required.In order to meet the needs of high gain,high efficiency,wide bandwidth,large power,miniaturization and so on,this paper designs a radio frequency power amplifier worked at 3.4~3.6 GHz with the parallel open circuit microstrip method based on the step matching circuit.The design method proposed in this paper aims to solve the difficulty of accurate measurement to the dynamic impedance of transistor and the non-negligible difference between theory simulation and practical testing.In this design,the input and output matching network always remain in a dynamic matching condition by utilizing the parallel open circuit microstrip with the adjustable physical length and width.This kind design is beneficial for the later debugging circuit to reach the best matching state.In order to verify the feasibility of the design scheme,this paper designs a radio frequency power amplifier operating at 3.5 GHz with CREE CGHV40030 and completes circuit implementation and test.The simulation and test results demonstrate that it’s easy to debug circuit,determine the optimum matching network,realize the test results very closed to the simulation results and obtain good performance by utilizing the proposed design method.The AM-AM distortion is less than 1,the AM-PM distortion is less than 5°/dB,S11 is less than-5.1 dB,S12 is larger than 18.3 dB,the output power is larger than 45 dB,the gain is larger than 12 dBm,and the drain efficiency is larger than 66%.
作者
肖曼琳
杜鑫威
蔡丽媛
雍伟
Xiao Manlin;Du Xinwei;Cai Liyuan;Yong Wei(School of Urban Railway Transportation,Shanghai University of Engineering Science,Shanghai 201620,China;Feixiang Technology(Wuxi)Co.,Ltd.,Wuxi 214026,China;Dynax Semiconductor Co.,Ltd.,Shanghai 201203,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2022年第12期244-252,共9页
Journal of Electronic Measurement and Instrumentation
基金
横向科研基金((21)GP-034全数字RF频率合成器及功放开发)项目资助
关键词
射频功率放大器
5G基站
匹配网络
开路微带线
radio frequency power amplifier
5G communication base station
network matching
open circuit microstrip
作者简介
通信作者:肖曼琳,2003,2006,2013年分别于电子科技大学分别获得学士,硕士,博士学位,现为上海工程技术大学讲师,主要研究方向为信号与信息处理、电路与系统等。E⁃mail:manlinxiao@sues.edu.cn;杜鑫威,2021年于安徽大学获得学士学位,现为上海工程技术大学硕士研究生,主要研究方向为射频锁相环设计与实现。E⁃mail:dxw12302021@163.com;蔡丽媛,2018年于华东交通大学获得学士学位,2021年于上海工程技术大学获得硕士学位,现为飞骧科技(无锡)有限公司工程师,主要研究方向为射频功放设计。E⁃mail:liyuancai_sues@163.com;雍伟,2004、2007年分别于电子科技大学获得学士、硕士学位,现为苏州能讯高能半导体有限公司高级应用工程师,主要研究方向为射频功放芯片应用。E⁃mail:yongwei_0926@163.com
