一种工作在基模的低磁场Ka波段RBWO优化设计  

Optimum Design of a Ka-Band RBWO Operating With Low Magnetic Field

作　　者：李爽[1,2] 滕雁[1] 吴平[1] 王东阳[1] 陈昌华[1] LI Shuang;TENG Yan;WU Ping;WANG Dong-yang;CHEN Chang-hua(Northwest Institute of Nuclear Technology,Xi'an 710024,China;Key Laboratory for Physical Electronics and Devices of the Ministry of Education,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西北核技术研究所,西安710024 [2]西安交通大学物理电子与器件教育部重点实验室,西安710049

出　　处：《现代应用物理》2019年第1期38-42,共5页Modern Applied Physics

基　　金：国家自然科学基金资助项目(61871329)

摘　　要：为研制低磁场条件下的高功率毫米波源,对工作在TM_(01)模的Ka波段相对论返波管(RBWO)开展了深入研究。首先通过理论计算,分析了慢波结构的色散特性及耦合阻抗特性,获得了工作在基模的RBWO结构的基本参数。然后结合数值模拟方法,对器件的工作条件进行了深入分析,对整管进行了数值模拟。结果显示,该结构能够产生的输出功率约为400 MW,微波频率约为28.4GHz,工作效率约为31%。器件的起振小于5ns,产生的模式纯净,工作稳定性较好。To develop a high power millimeter wave generator at low magnetic field,the relativistic backward oscillator(RBWO)operating with TM01 mode at Ka-band is studied.The cold characteristics of the slow-wave structure,including the dispersion and the coupling impedance,are theoretically researched.And the dimensional parameters for the RBWO operating with fundamental mode are accordingly confirmed.Then,through the method of particle-in-cell(PIC)simulations,the performance of the device is further studied under various conditions,and the structure of the RBWO is optimized.The simulation results show that the optimized structure operates stably with a pure output and the output power reaches 400 MW at the frequency of 28.4 GHz,corresponding to the efficiency of 31%.

关 键 词：KA波段 低磁场 毫米波 相对论返波管 色散特性 

分 类 号：TN125[电子电信—物理电子学]