| 一种基于阻抗缓冲匹配技术的高效率Doherty放大器 |
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| 引用本文： | 孔娃,夏景,丁大维,杨利霞,詹永照.一种基于阻抗缓冲匹配技术的高效率Doherty放大器[J].微电子学,2017,47(5):601-604. |
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| 作者姓名： | 孔娃 夏景 丁大维 杨利霞 詹永照 |
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| 作者单位： | 江苏大学 计算机科学与通信工程学院, 江苏 镇江 212013,江苏大学 计算机科学与通信工程学院, 江苏 镇江 212013,江苏大学 计算机科学与通信工程学院, 江苏 镇江 212013,江苏大学 计算机科学与通信工程学院, 江苏 镇江 212013,江苏大学 计算机科学与通信工程学院, 江苏 镇江 212013 |
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| 基金项目： | 江苏省自然科学基金资助项目(BK20150528);江苏省高校自然科学基金资助项目(15KJB510007,16KJB510006);江苏大学高级人才科研启动基金(15JDG080) |
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| 摘 要： | 为了在功率回退时满足功率放大器对高效率的要求,提出了一种采用阻抗缓冲匹配技术的Doherty功率放大器。通过负载牵引仿真,得到功放管的最佳基波和谐波负载阻抗。在此基础上,采用一种谐波控制阻抗匹配网络设计方法来设计主/辅路放大器的输出匹配网络,实现了高回退效率。为了验证该方法的有效性,设计并实现了一个1.635 GHz高效率Doherty功率放大器。测试结果表明,该放大器的饱和功率大于44 dBm,峰值效率为75%,6 dB功率回退时的效率为70%。该方法能有效提高Doherty功率放大器的回退效率。
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| 关 键 词： | 阻抗缓冲匹配 谐波控制 功率回退 高效率 |
| 收稿时间： | 2017/1/6 0:00:00 |
A Highly Efficient Doherty Power Amplifier Based onImpedance Buffer Matching Technique |
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| KONG W,XIA Jing,DING Dawei,YANG Lixia and ZHAN Yongzhao.A Highly Efficient Doherty Power Amplifier Based onImpedance Buffer Matching Technique[J].Microelectronics,2017,47(5):601-604. |
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| Authors: | KONG W XIA Jing DING Dawei YANG Lixia and ZHAN Yongzhao |
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| Affiliation: | School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China,School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China,School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China,School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China and School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China |
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| Abstract: | To achieve a high efficiency of power amplifiers at back-off output powers, a Doherty power amplifier (DPA) using impedance buffer matching technique was presented. After obtaining optimal fundamental and harmonic impedances of power amplifier tube using load-pull simulations, a harmonic control impedance matching network was proposed to build the output matching networks of main and auxiliary amplifiers for highly efficient operation. To verify the proposed method, a 1.635 GHz highly efficient DPA was designed and measured. Measurement results showed that the proposed DPA had a saturated output power of more than 44 dBm and a maximum efficiency of 75%, while the efficiency at 6 dB back-off output power was 70%. This method could enhance the back-off efficiency of DPA effectively. |
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| Keywords: | Impedance buffer matching Harmonic control Back-off output power High efficiency |
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