基于谐波控制的Doherty功率放大器设计
Design of Doherty power amplifier based on harmonic control
王帅 1安万通 1李晓明 1刘仁创 1李鑫1
作者信息
- 1. 河南理工大学 电气工程与自动化学院,河南 焦作 454000
- 折叠
摘要
功率放大器是无线通信里面重要的射频前端电路.为满足现代无线通信对功率放大器高效率的要求,首先基于谐波控制理论分析,设计了一种新型谐波控制电路,此新型谐波控制电路可对功率管产生的封装寄生参数进行补偿,也可对二次谐波、三次谐波进行谐波控制,提高了Doherty功率放大器效率.随后,针对传统Doherty功率放大器限制带宽的问题,提出了采用后匹配结构的方式设计Doherty功率放大器,提高了Doherty功率放大器的带宽.最后,采用Cree公司的CGH40010F GaN HEMT设计一款Doherty功率放大器并进行测试.在 1.85～2.15 GHz工作频带内,Doherty功率放大器输出功率可达到 44.3～44.8 dBm,增益为 12～15 dB,输出漏极效率(DE)大于 75%,6 dB回退效率大于 60%.结果表明,提出的Doherty功率放大器在效率方面具有显著优势.
Abstract
Power amplifier is an important RF front-end circuit in wireless communication.To meet the requirements of modern wireless communication for power amplification,a new harmonic control circuit was designed based on the analysis of harmonic control theory to improve the efficiency of power amplifier.The new harmonic control circuit can compensate the parasitic parameters generated by power tube,and it can also control the second harmonic and third harmonic to improve the efficiency of Doherty power amplifier.To address narrow bandwidth of traditional Doherty power amplifier,a post-matching structure was then proposed to design and improve the bandwidth of the Doherty power amplifier.Finally,a Doherty power amplifier was made and tested by using CGH40010F GaN HEMT from Cree company.From 1.85 GHz to 2.15 GHz,the output power of the Doherty power amplifier can reach 44.3-44.8 dBm,the gain is 12-15 dB,the output drain efficiency(DE)is more than 75%,and the 6 dB back-off efficiency is more than 60%.The results show that the designed Doherty power amplifier has obvious improvement in efficiency.
关键词
高效率/谐波控制/封装寄生/Doherty功率放大器/后匹配结构/6/dB回退Key words
high efficiency/harmonic control/encapsulation parasitism/Doherty power amplifier/post-matching structure/6 dB fallback引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据