多级降压收集极过渡区磁系统的计算及优化  

Simulation and Design Optimization of Magnetic System in Transition Region of Multistage Depressed Collector

作　　者：尚新文[1,2] 申鑫[1,2] 易红霞[1] 肖刘[1] 苏小保[1] Shang Xinwen Shen Xin Yi Hongxia Xiao Liu Su Xiaobao(Key Laboratory of High Power Micriwave Sources and Technology, Institute of Electronics, Chinese Academy of Sciences ,Beijing 100190, China University of Chinese Academy of Sciences ,Beijing 100049, China)

机构地区：[1]中国科学院电子学研究所中国科学院高功率微波源与技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《真空科学与技术学报》2016年第10期1124-1130,共7页Chinese Journal of Vacuum Science and Technology

摘　　要：运用三维电磁场模拟软件Ansoft Maxwell3D对多级降压收集极过渡区磁场进行模拟计算及修正,模拟与实测结果轴向最大磁场误差在6%,同时采用Ansoft Maxwell3D与MTSS协同仿真的方法,并以提高回收效率和减小回流率为目标对Ku波段空间行波管多级降压收集极过渡区磁场进行了优化,优化后收集极中心频率收集效率从77.28%提高到79.63%,回流率从2.49%降低到0.59%。并对整管进行了测试,测试结果表明,收集极收集效率大于73.77%,行波管总效率大于59%,回流率小于0.79%,达到了预期目标,可以满足某通信卫星的要求。The magnetic field in transition region of the multistage depressed collector （MDC） was simulated, modified and measured for design optimization of the magnetic system. The discrepancy between the simulated and measured results was less than 6%. The MDC＇ s magnetic system of Ku-band 150 W travelling wave tube （TWT）, dedicated to communication satellites, was optimized via simulation with a combination of Ansoft Maxwell3 D and lab-developed software Microwave-Tube-Simulator-Suite （MTSS） , to improve the recovery efficiency and reduce the back-streaming rate. The simulated results show that the design optimization increased the recovery efficiency from 77.28% to 79.45% and reduced the back-streaming rate from 2.49% 0.78% at the middle operating frequency. The test results show that the DMC＇s recovery efficiency was over 73.77% ,the TWT overall efficiency was higher than 59%, and the back-streaming rate was lower than 0.79%. The newly-designed magnetic system satisfies the preliminary requirements of a communications satellite.

关 键 词：多级降压收集极 过渡区磁场 回收效率 总效率 MTSS ANSOFT axwell3D 

分 类 号：TN124[电子电信—物理电子学]