Ka频段200W线性固态功放设计  

Design of a Ka-Band 200W High Linear Solid-State Power Amplifier

作　　者：朱海帆[1] 党章[1] 李凯[1] 刘祚麟[1] 

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《微波学报》2012年第3期51-55,共5页Journal of Microwaves

摘　　要：介绍了一种Ka频段200W高线性度固态功放的工程实现。采用混合式功率合成与波导功率合成相结合的技术路线,在Ka频段实现了近百路的高效功率合成。功放共合成了96个功放芯片,连续波输出功率可达250W;针对功率器件线性度不足的现状,采用射频预失真技术优化其线性度,三阶互调指标优于-33dBc,改善幅度最高达15dB;固态功放设计中充分考虑了工程化与产品化性能,结构外形标准、散热性能良好,并配置了完善的控保功能,在可靠性及实用性方面均初步达到工程使用的要求。This paper introduces an engineering realization of a Ka-band 200W high linear solid-state power amplifier （SSPA）. By adopting hybrid and waveguide power combining technologies, a continuous wave output power of 250W can be realized at Ka-band with 96 channels combined. In order to improve its linearity, RF predistortion technology is applied. And the third-order intermodulation is better than -33dBc which the improvement is up to 15dB. To meet engineering and productive requirement, a standard configuration and good heat dissipation are designed. The control and maintenance func- tions are provided, the operation and reliability are both met the engineering requirement.

关 键 词：KA频段 固态功放 功率合成 预失真 

分 类 号：TN722.75[电子电信—电路与系统]