Ku波段800 W氮化镓高线性固态功放研制  

Ku-band 800 W GaN high linear solid-state power amplifier

作　　者：胡顺勇 李凯[1] 张能波 党章[1] Hu Shunyong;Li Kai;Zhang Nengbo;Dang Zhang(The 10th Research Institute of CETC,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第十研究所,四川成都610036

出　　处：《电子技术应用》2024年第6期71-76,共6页Application of Electronic Technique

摘　　要：介绍了一种Ku波段800 W氮化镓(GaN)高线性度固态功放的工程实现。使用32片GaN功率芯片,采用微带Gysel功分器与波导功分/合成网络相结合的方式进行功率合成,功放在750 MHz的工作频带内连续波饱和输出功率大于850 W。采用射频预失真线性化技术优化氮化镓功放线性度,功放三阶互调指标改善幅度大于5 dB,优于-32 dBc。功放选择带热管的翅片散热器的强制风冷方案,提高了散热器的换热效率,散热性能良好。通过实时监测功放芯片管壳温度,自动配置散热风扇转速,实现了功放的自适应热管理,在降低功放功耗的同时,减小了产品噪声。功放配置了完善的控保功能,技术状态稳定。由两台功放组成了1备1组件系统,可靠性及实用性满足工程使用要求,适用于测控、通信、广电等领域的微波发射系统。This paper introduces an engineering realization of a Ku-band 800 W GaN high linear solid-state power amplifier.A continuous wave output power of 850 W in 750 MHz operation band is realized by the Gysel power divdider and waveguide based power dividing/combining network with 32 GaN MMIC chips.The RF predistortion linearization technology is used to optimize the linearity of the GaN power amplifier,and the third-order intermodulation of the power amplifier is improved by more than 5 dB,which is better than-32 dBc.The power amplifier adopts a forced air cooling scheme with a heat pipe fin radiator,which improves the heat transfer efficiency of the radiator and has good heat dissipation performance.By monitoring the temperature of the power amplifier chip and automatically configuring the speed of the cooling fan,adaptive thermal management of the power amplifier is achieved,which reduces power consumption while reducing product noise.The power amplifier is equipped with comprehensive control and protection functions and has stable technical status.Two power amplifiers form a 1:1 system,which meets the reliability and practicality requirements for engineering use and is suitable for microwave transmission systems in the fields of measurement and control,communication,broadcasting,and television.

关 键 词：KU频段 氮化镓功放 射频预失真 

分 类 号：TN73[电子电信—电路与系统]