| 1414．5 GHz Doherty 功率放大器研究 |
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| 引用本文： | 程知群,张弦.1414．5 GHz Doherty 功率放大器研究[J].杭州电子科技大学学报,2013(6):25-28. |
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| 作者姓名： | 程知群 张弦 |
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| 作者单位： | 杭州电子科技大学射频电路与系统教育部重点实验室,浙江杭州310018 |
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| 基金项目： | 基金项目：浙江省自然科学基金资助项目（Z1110937） |
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| 摘 要： | 该文设计了一款应用于卫星通信基站的Ku波段高效率功率放大器。设计电路中的有源器件为Triquint 0．25μm GaN HEMT功率管，首先对该功率晶体管等效电路模型进行参数提取，用HFSS软件对无源元件进行电磁场仿真，用Agilent ADS软件对电路有源和无源进行了联合仿真。电路拓扑结构为Doherty结构，其中主放大器和辅助放大器分别设计，再通过Wilkinson功分器两路合成。仿真结果显示，在1414．5 GHz频率下，设计的功率放大器输出功率大于12 W，功率增益大于8 dB，功率附加效率高于45％。
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| 关 键 词： | Doherty结构 功率放大器 建模 |
Study of 14-14 .5 GHz Doherty Power Amplifier |
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| CHENG Zhi-qun,ZHANG Xian.Study of 14-14 .5 GHz Doherty Power Amplifier[J].Journal of Hangzhou Dianzi University,2013(6):25-28. |
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| Authors: | CHENG Zhi-qun ZHANG Xian |
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| Affiliation: | (Key Lb. of RF Circuit and System, Education Ministry, Hangzhou Dianzi University, Hangzhou Zhejiang 310018, China) |
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| Abstract: | A Ku band high efficiency power amplifier is designed which will be applied for satellite communication base station .The active device of the design circuit is 0 .25 μm GaN HEMT from Triquint Corporation . Parameter extraction of an equivalent circuit model for the transistor is carried out , and the passive devices are simulated using HFSS software , then the active device and passive devices are co-simulated using Agilent ADS software .Doherty structure is proposed for the circuit .The main power amplifier and auxiliary power amplifier are designed respectively and then combined by a Wilkinson power divider .The simulated results show that the proposed PA has an output power more than 12 Watts, a power gain higher than 8 dB, a power added efficiency higher than 45%. |
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| Keywords: | GaN HEMT Doherty structure power amplifier GaN HEMT modeling |
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