基于双阻抗匹配的宽带Doherty功率放大器设计

发布时间：2018-01-16 04:18

本文关键词：基于双阻抗匹配的宽带Doherty功率放大器设计　出处：《江苏大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：为了满足采用高峰均比调制信号的未来无线通信系统中功率放大器高效和宽带的设计需求,研究了一种改进的宽带Doherty功率放大器设计方法.为了实现Doherty在功率回退和饱和输出时的阻抗变换,提出了一种双阻抗匹配网络设计方法来仿真设计主路和辅路输出匹配网络,从而简化了负载调制网络,展宽了带宽.实现并测试了一个2.30~2.80 GHz宽带Doherty功率放大器(DPA),对所提出方法的有效性进行了验证.结果表明:所设计的宽带DPA在工作带宽内增益波动小于2 d B,饱和功率大于43.5 d Bm,饱和时的峰值效率为66%~71%,6 d B回退时的效率为48%~59%,可满足未来无线通信系统中对高峰均比调制信号高效率放大的要求.
[Abstract]:In order to meet the demand of high efficiency and wideband design of power amplifier in future wireless communication system using peak-to-average ratio modulation signal. An improved design method of wideband Doherty power amplifier is studied in order to realize the impedance transformation of Doherty in power retrograde and saturation output. A double impedance matching network design method is proposed to simulate and design the main and auxiliary output matching networks, thus simplifying the load modulation network. The bandwidth is broadened. A 2.30U 2.80 GHz wideband Doherty power amplifier is implemented and tested. The effectiveness of the proposed method is verified. The results show that the gain fluctuation of the designed wideband DPA is less than 2 dB and the saturation power is more than 43.5 dBm in the working bandwidth. The peak efficiency at saturation is 66 / 71and 6dB / 6dB, which is 48 and 59, which can meet the requirement of high efficiency amplification of peak to average ratio modulation signal in future wireless communication system.
【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) 江苏大学高级人才科研启动基金资助项目(15JDG080)
【分类号】：TN722.75
【正文快照】： 引文格式:孔娃,夏景.基于双阻抗匹配的宽带Doherty功率放大器设计[J].江苏大学学报(自然科学版),2017,38(6):682-686,695.随着无线通信频谱空间愈发紧张,系统能够连续使用的频谱资源有限,因此可能会使用数百MHz频谱中若干个不连续的频段,这就要求功率放大器能够在实现高回退效

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