一种基于双阻抗匹配的高回退对称式Doherty功率放大器
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- 英文论文题名：A Symmetric Doherty Power Amplifier with Large Back-off Power Range Based on Two-point Matching Network
- 论文作者：夏景 ; 孔娃 ; 陈晓恩 ; 祝帅雷 ; 杨利霞
- 英文论文作者：XIA Jing ; KONG Wa ; CHEN Xiaoen ; ZHU Shuailei ; YANG lixia ; School of Computer Science and Communication Engineering ; Jiangsu University
- 年：2017
- 作者机构：江苏大学计算机科学与通信工程学院;
- 论文关键词：Doherty功率放大器 ; 双阻抗匹配网络 ; 高效率 ; 功率回退
- 英文论文关键词：Doherty power amplifier ; two impedance matching network ; high efficiency ; back-off power
- 会议召开时间：2017-05-08
- 会议录名称：2017年全国微波毫米波会议论文集（中册）
- 英文会议录名称：Proceedings of 2017 National Conference on Microwave and Millimeter Waves(NCMMW2017)
- 语种：中文
- 分类号：TN722.75
- 学会代码：ZDWB
- 会议名称：2017年全国微波毫米波会议
- 会议地点：中国浙江杭州
- 主办单位：中国电子学会
- 学会名称：中国电子学会微波分会
- 页数：4
- 文件大小：1146k
- 原文格式：D
- 会议级别：全国
摘要
本文研究了一种基于双阻抗匹配的高回退Doherty功率放大器。针对Doherty在饱和与回退时的两对阻抗变换要求,研究了一种基于传输矩阵的双阻抗匹配方法来设计输出匹配网络。为了增大放大器的功率回退范围,合理设计辅路输出匹配电路,使其在低功率时产生对主路的补偿电抗。设计和实现了一个2.5GHz高回退对称Doherty功率放大器。测试结果表明放大器饱和功率大于44d Bm,峰值效率为68%。在主辅两路使用相同功放管情况下,9d B回退时的效率超过50%。
In this paper, a Doherty power amplifier(DPA) based on two-point matching network was studied for large back-off power range. To achieve the impedance transformations both at saturation and in the low power region, a two impedance matching network design based on transmission matrix was proposed to design the main and auxiliary output matching networks(OMNs). To enhance the back-off power range, the auxiliary OMN was designed to generate a compensation reactance for the main amplifier in the low power region. A 2.5 GHz symmetric DPA with large back-off power range was designed and measured. Measurement results show that the DPA using symmetric structure has a saturated output power of higher than 44 d Bm and a saturated efficiency of 68%, while the 9 d B back-off efficiency is higher than 50%.
In this paper, a Doherty power amplifier(DPA) based on two-point matching network was studied for large back-off power range. To achieve the impedance transformations both at saturation and in the low power region, a two impedance matching network design based on transmission matrix was proposed to design the main and auxiliary output matching networks(OMNs). To enhance the back-off power range, the auxiliary OMN was designed to generate a compensation reactance for the main amplifier in the low power region. A 2.5 GHz symmetric DPA with large back-off power range was designed and measured. Measurement results show that the DPA using symmetric structure has a saturated output power of higher than 44 d Bm and a saturated efficiency of 68%, while the 9 d B back-off efficiency is higher than 50%.
引文
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4 王洋,刘太君,叶焱等.逆F类高效氮化镓Doherty射频功率放大器设计[J].微波学报,2014,30(6):64-68.
5 Ma C,Pan W,Shao S,et al.A wideband Doherty power amplifier with 100 MHz instantaneous bandwidth for LTE-advanced applications[J].IEEE Microwave and Wireless Components Letters,2013,23(11):614-616.
6 Pang J,He S,Huang C,et al.A post-matching Doherty power amplifier employing low-order impedance inverters for broadband applications[J].IEEE Transactions on Microwave Theory and Techniques,2015,63(12):4061-4071.
7 Chen X,Chen W,Ghannouchi F M,et al.A broadband Doherty power amplifier based on continuous-mode technology[J].IEEE Transactions on Microwave Theory and Techniques,2016,64(12):4505-4517.
8 Xia J,Yang M S,Guo Y,et al.A broadband high-efficiency Doherty power amplifier with integrated compensating reactance[J].IEEE Transactions on Microwave Theory and Techniques,2016,64(7):2014-2024.
9 Fang X H,Cheng K K M.Extension of High-Efficiency Range of Doherty Amplifier by Using Complex Combining Load[J].IEEE Transactions on Microwave Theory and Techniques,2014,62(9):2038-2047.
2 Chen S,Xue Q.Optimized Load Modulation Network for Doherty Power Amplifier Performance Enhancement[J].IEEE Transactions on Microwave Theory and Techniques,2012,60(11):3474-3481.
3 南敬昌,方杨,李厚儒.高效率高线性度功率放大器的设计与实现[J].固体电子学研究与进展,2013,33(3):244-248.
4 王洋,刘太君,叶焱等.逆F类高效氮化镓Doherty射频功率放大器设计[J].微波学报,2014,30(6):64-68.
5 Ma C,Pan W,Shao S,et al.A wideband Doherty power amplifier with 100 MHz instantaneous bandwidth for LTE-advanced applications[J].IEEE Microwave and Wireless Components Letters,2013,23(11):614-616.
6 Pang J,He S,Huang C,et al.A post-matching Doherty power amplifier employing low-order impedance inverters for broadband applications[J].IEEE Transactions on Microwave Theory and Techniques,2015,63(12):4061-4071.
7 Chen X,Chen W,Ghannouchi F M,et al.A broadband Doherty power amplifier based on continuous-mode technology[J].IEEE Transactions on Microwave Theory and Techniques,2016,64(12):4505-4517.
8 Xia J,Yang M S,Guo Y,et al.A broadband high-efficiency Doherty power amplifier with integrated compensating reactance[J].IEEE Transactions on Microwave Theory and Techniques,2016,64(7):2014-2024.
9 Fang X H,Cheng K K M.Extension of High-Efficiency Range of Doherty Amplifier by Using Complex Combining Load[J].IEEE Transactions on Microwave Theory and Techniques,2014,62(9):2038-2047.