基于可回收能力的空间行波管高效率研究  

Efficiency Enhancement of Space TWT based on Collectability

作　　者：易红霞[1,2] 肖刘[1] 刘濮鲲[1] 李国超[1,2] 薛智浩[1,2] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《微波学报》2010年第S1期526-529,共4页Journal of Microwaves

基　　金：自然科学基金重点项目(60931001);自然科学基金青年基金项目(60801030)

摘　　要：效率是行波管设计的重要指标之一。对于空间行波管,效率的提高可以立即转化为经济效益。本文通过对注波互作用电路参数的优化设计,得到便于收集的"作用完了"的电子注。通常具有高电子效率的电子注,能量分散较大,不利于收集。通过设定电子效率大于25%这个限制条件,来保证了具有高可回收能力的电子注,同时具有较高的输出功率。在遗传算法中调用3维MTSS,用来计算注波互作用后的输出能量和电子能谱图。并对一支Ku波段的螺旋线行波管进行优化设计,从数值计算结果来看,可回收效率提高到了89%,且具有26.9%的电子效率。High efficiency is one of the essential requirements for modern space Traveling Wave Tube(TWT) development,and a single percentage point increase of overall efficiency is very significant to translate into potential revenue increases.The enhancement of overall efficiency was realized by optimizing the helix pitch profile of a TWT to maximize the collector efficiency.The maximum collector efficiency of a TWT normally conflicts with the basic beam-wave interaction efficiency.Such a conflict has been mitigated via setting the electronic efficiency higher than 25% as a constraint of the algorithm to ensure a high output power.The 3-D large signal Beam-Wave Interaction Simulator(BWIS)of MTSS,which was employed to calculate the output power and the energy distribution of the spent beam,was integrated with the Genetic algorithm.The detailed design of a Ku-band helix traveling wave was described and maximum collector efficiency of 89% with electronic efficiency of 26.9% was achieved from the simulation results.

关 键 词：螺旋线行波管 效率 遗传算法 双渐变慢波结构 可回收能力 

分 类 号：TN124[电子电信—物理电子学]