螺旋线行波管电子效率改善的数值模拟  

Efficiency enhancement simulation of helix traveling-wave tube

作　　者：朱兆君[1] 贾宝富[1] 罗正祥[1] 

机构地区：[1]电子科技大学光电信息学院,成都610054

出　　处：《强激光与粒子束》2007年第5期815-819,共5页High Power Laser and Particle Beams

基　　金：国防科技基础研究基金资助课题

摘　　要：运用全电磁2.5维粒子模拟软件MAGIC和3维高频结构仿真软件HFSS,模拟仿真了正-负双跳变慢波结构对螺旋线行波管电子效率的改善,从慢波系统高频参量、非同步参量、增益参量和电子注相位等角度进行了讨论。设计并加工了一支采用双跳变结构的螺旋线行波管,实测结果表明:采用双跳变结构后可将电子效率从19%提高到29%;模拟仿真方法得到的平均相对误差为5%左右。2.5-dimensional（2.5-D） particle-in-cell simulation code MAGIC and 3-D electromagnetic simulation code HFSS were used to investigate the helix traveling-wave tube（TWT） with positively-negatively tapered structure for efficiency enhancement. Some key parameters to efficiency were analyzed, including high-frequency parameter, non-synchronous parameter, gain parameter and electron phase. A positively-negatively tapered helix TWT were designed and fabricated. The results show that the measured efficiency of the tapered TWT reaches 29%, while that of the non-tapered TWT is 19%. It shows the average relative error of the simulation method is about 5 %.

关 键 词：螺旋线行波管 电子效率 正-负双跳变 电磁仿真 粒子模拟 

分 类 号：TN124[电子电信—物理电子学]