基于改进简化实频技术的超宽带功率放大器设计

刘国华; 周国祥; 郭灿天赐; 程知群

doi:10.11999/JEIT200564

基于改进简化实频技术的超宽带功率放大器设计

doi: 10.11999/JEIT200564

杭州电子科技大学射频电路与系统教育部重点实验室杭州 310018

基金项目: 国家自然科学基金(91938201, 61871169)；浙江省自然科学基金(LZ20F010004)

详细信息

作者简介:
刘国华：男，1975年生，博士，副教授，研究方向为射频功率放大器设计

周国祥：男，1996年生，硕士生，研究方向为射频功率放大器电路设计与应用

郭灿天赐：男，1995年生，硕士生，研究方向为射频功率放大器电路设计与应用

程知群：男，1964年生，教授，博士生导师，研究方向为高效率功率放大器、新型半导体器件结构和建模技术、射频/微波集成电路、毫米波/太赫兹集成电路设计

通讯作者:
刘国华　ghliu@hdu.edu.cn

中图分类号: TN722
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- 文章访问数: 1314
- HTML全文浏览量: 508
- PDF下载量: 135
- 被引次数: 0
出版历程
- 收稿日期: 2020-07-26
- 修回日期: 2020-09-24
- 网络出版日期: 2020-09-26
- 刊出日期: 2021-06-18

Design of Ultra-wideband Power Amplifier Based on Modified Simplified Real Frequency Technology

Key Laboratory of RF Circuit and System, Ministry of Education, Hangzhou Dianzi University, Hangzhou 310018, China

Funds: The National Natural Science Foundation (91938201, 61871169), Zhejiang Provincial Natural Science Foundation (LZ20F010004)

摘要

摘要: 该文提出了一种基于改进简化实频算法的跨多倍频超宽带功率放大器。结合负载牵引技术，分析晶体管负载端的最优阻抗值变化。通过改进简化实频法中的优化目标和误差函数，对频段内选取多个频点的最优阻抗进行分析，设计并优化出了功率放大器的输出匹配电路，提高了功放的工作带宽。测试结果显示，在 0.5～2.7 GHz频段内，饱和输出功率达到 42.5 dBm，饱和漏极效率为 64%～75%。
- 功率放大器 /
- 简化实频法 /
- 多倍频 /
- 漏极效率
Abstract: A multi-octave power amplifier is proposed based on the improved simplified real frequency method. Combined with the load-pull technology, the optimal impedance of the transistor is analyzed. By improving the optimization objective and error function in the improved simplified real frequency method, the optimal impedance of multiple frequency points in the frequency band is analyzed. The output matching circuit of the power amplifier is designed. The broadband matching circuit is optimized, and the working bandwidth of the amplifier is improved. The test results show that the saturation output power reaches 42.5 dBm and the saturation drain efficiency is 64%～75% within the frequency band of 0.5～2.7 GHz.
- Power amplifier /
- Simplified real frequency method /
- Multi-octave /
- Drain efficiency

HTML全文

图 1 散射参数的匹配网络

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图 2 简化实频法得到的输出匹配电路

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图 3 晶体管负载数据和输出匹配网络

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图 4 匹配电路的S参数仿真结果

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图 5 整体拓扑结构

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图 6 小信号仿真与测试结果

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图 7 漏极效率、输出功率和增益仿真与测试结果

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表 1 各个频点下的最优阻抗值

频率(GHz)	Zopt(Ω)	频率(GHz)	Zopt(Ω)
0.5	26.9+j*23.6	1.8	27.4+j*9.3
0.8	31.7+j*12.9	2.0	19.6+j*16.8
1.0	26.1+j*11.1	2.3	21.3+j*9.1
1.3	19.9+j*14.1	2.5	18.3+j*7.2
1.5	21.2+j*7.9	2.7	17.5+j*6.5

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表 2 本文与近几年论文中功放主要指标对比

参考文献	频段(GHz)	漏极效率(%)	增益(dB)	输出功率(dBm)	相对带宽(%)
文献[15]	1.2～3.6	60～72	10.1～11.5	40.0～42.2	100
文献[16]	0.6～2.5	52～73	9.2～11.3	39.0～40.5	120
文献[17]	0.5～2.3	60～81	11.7～12.5	39.2～41.2	129
文献[18]	0.4～2.3	62～81	11.0～14.0	39.0～42.0	141
本文	0.5～2.7	64～75	10.0～12.3	40.0～42.5	137

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参考文献(18)

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