一种基于阻抗缓冲匹配技术的高效率Doherty放大器

发布时间：2018-03-16 22:04

本文选题：阻抗缓冲匹配　切入点：谐波控制　出处：《微电子学》2017年05期 　论文类型：期刊论文

【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1.635GHz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44dBm,峰值效率为75%,6dB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。
[Abstract]:In order to meet the requirement of high efficiency of power amplifier when the power is back, a Doherty power amplifier using impedance buffer matching technique is proposed, which is simulated by load traction. The optimum fundamental wave and harmonic load impedance of power amplifier are obtained. Based on this, a harmonic control impedance matching network design method is used to design the output matching network of the main / auxiliary circuit amplifier. In order to verify the effectiveness of this method, a 1.635GHz high efficiency Doherty power amplifier is designed and implemented. The test results show that, The saturation power of the amplifier is more than 44dBm, and the peak efficiency is 75,6dB. The efficiency of the amplifier is 70. This method can effectively improve the fallback efficiency of the Doherty power amplifier.
【作者单位】：江苏大学计算机科学与通信工程学院;
【基金】：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)
【分类号】：TN722.75

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