双谐振腔长脉冲相对论返波振荡器研究  

Investigation of a long-pulse relativistic backward wave oscillator with dual resonant cavities

作　　者：葛行军[1] 张军[1] 靳振兴[1] 杨建华[1] 钱宝良[1] 钟辉煌[1] 

机构地区：[1]国防科技大学光电科学与工程学院,湖南长沙410073

出　　处：《电波科学学报》2015年第4期754-758,共5页Chinese Journal of Radio Science

基　　金：国家高技术发展计划项目资助课题

摘　　要：延长输出微波脉宽是提高输出平均功率水平的一种重要技术途径.受限于"脉冲缩短"这一国际难题,通常高功率微波源输出微波脉宽较窄.相对论返波振荡器是一种高功率、高效率、可重频运行的高功率微波源,获得了广泛研究和应用.在长脉冲相对论返波振荡器研究方面,现有研究方法很难兼顾长脉冲与高效率.针对上述问题,提出了一种双谐振腔长脉冲相对论返波振荡器的设计方法:采用双谐振腔降低射频场;利用非均匀慢波结构增强束波作用;引入大半径收集极减少电子轰击产生的二次电子的数量.实验结果表明,该器件与现有的长脉冲相对论返波振荡器相比,可以在延长输出微波脉宽的同时提高器件束波作用效率.Prolonging the pulse duration is an important method to increasing the average output power of the high power microwave(HPM)pulses.However,the pulse duration of the HPM is narrow owing to the'pulse shortening'phenomenon.Relativistic backward-wave oscillators(RBWOs)are one of most promising HPM sources for its high output power,high power conversion efficiency,and high repetition operations.It is difficult to prolong the pulse duration while enhancing the beam-wave efficiency.To solve the above-mentioned problem,a long-pulse RBWO with dual resonant cavities is proposed.Firstly,the dual resonant cavities is used to decrease the electric field.Then the non-uniform SWSs are introduced in the device to enhance the beam-wave efficiency.Finally,a large-radius collector is employed to decrease the electron stimulated desorption and secondary electron emission.It is shown in the experimental results that the pulse duration and the beam-wave efficiency are enhanced,compared with the conventional long-pulse RBWOs.

关 键 词：天波高功率微波 相对论返波振荡器 长脉冲 双谐振腔 

分 类 号：TN752[电子电信—电路与系统]