| Doherty射频功率放大器研究与实践 |
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| 引用本文： | 范瑜,张惠国,潘启勇,沈略.Doherty射频功率放大器研究与实践[J].常熟理工学院学报,2012,26(2):49-54. |
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| 作者姓名： | 范瑜 张惠国 潘启勇 沈略 |
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| 作者单位： | 常熟理工学院物理与电子工程学院,江苏常熟,215500 |
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| 基金项目： | 江苏省自然科学基金“高灰阶低干扰LED显示驱动芯片关键技术研究” |
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| 摘 要： | 在分析经典Doherty放大器工作原理基础上,对主从放大器使用不同的漏极偏置电压和电路匹配,设计出一种新型Doherty功率放大器,分析了该结构对于效率和线性化的影响.以飞思卡尔公司的MRF6S20010N功放模型,利用ADS2008对放大器进行静态工作点选取,源负载网络匹配和微带线的计算.结果表明这种功率放大器不但能够提高性能指标,还增强了放大器的稳定性.
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| 关 键 词： | Doherty功率放大器 先进设计系统(Advanced Design System ADS) 负载牵引 线性化技术 |
The Research and Practice of RF Power Amplifier Based on Doherty Technology |
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| FAN Yu, ZHANG Hui-guo, PAN Qi-yong, SHEN Lue.The Research and Practice of RF Power Amplifier Based on Doherty Technology[J].Journal of Changshu Institute of Technology,2012,26(2):49-54. |
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| Authors: | FAN Yu ZHANG Hui-guo PAN Qi-yong SHEN Lue |
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| Institution: | (School of Physics and Electronic Engineering, Changshu Institute of Technology, Changshu 215500, China) |
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| Abstract: | Linearization technique of power amplifier (PA) is important in communication system. Efficiency improvement technique is a key to linear amplifier. Based on the classic Doherty amplifier, a new Doherty power amplifier is explored, and different drain voltage and matching network are set for both carrier amplifier and peak amplifier. The efficiency and linearity of the amplifier are analyzed in detail. Through a transistor model provided by Freescale MRF6S20010N, ADS2008 is used for selecting static point, matching the network of load and source impedance, and computing the width and length of microstrip line. Simulation results show that this power amplifier performs well in linearity, efficiency and stability. |
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| Keywords: | Doherty power amplifier Advanced Design System (ADS) load-pull linearization technology |
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