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基于谐波控制的Doherty功率放大器设计

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  • 国家科技期刊平台
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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.
Design of Doherty power amplifier based on harmonic control
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.

high efficiencyharmonic controlencapsulation parasitismDoherty power amplifierpost-matching structure6 dB fallback

王帅、安万通、李晓明、刘仁创、李鑫

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河南理工大学 电气工程与自动化学院,河南 焦作 454000

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

河南理工大学博士基金

B2016-18

2024

10.14106/j.cnki.1001-2028.2024.1316

电子元件与材料
中国电子学会　中国电子元件行业协会　国营第715厂(成都宏明电子股份有限公司)

电子元件与材料

CSTPCD北大核心
影响因子：0.491
ISSN：1001-2028
年,卷(期)：2024.43(6)
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