S波段紧凑型相对论磁控管的模拟计算和分析  

Simulation and Analysis of S-band Compact Relativistic Magnetrons

作　　者：姜山易 毛晓军 吕朋杰 江云 蔡芳盛 陈子翀 尹蕊 JIANG Shanyi;MAO Xiaojun;L Pengjie;JIANG Yun;CAI Fangsheng;CHEN Zichong;YIN Rui(Hunan Vanguard Group Co.,Ltd.,Changsha 410100,China)

机构地区：[1]湖南云箭集团有限公司,长沙410100

出　　处：《微波学报》2024年第6期26-31,共6页Journal of Microwaves

基　　金：湖南省科技创新计划(2023RC3265)。

摘　　要：为了实现高功率微波器件的小型化,文中设计了一款在低磁场条件下高效率工作的S波段同轴输出的相对论磁控管。采用“荷叶型”输出结构直接提取高频场能量,使得器件在径向尺寸上结构更加紧凑,并在输入端引入阴极帽,进一步约束了高频场区域的轴向漂移电子,使得高频场能量充分转换,从而获得较高的输出功率及转换效率,同时增强了器件工作的稳定性。在全电磁粒子模拟软件CHIPIC中建立三维模型,分析了不同尺寸的“荷叶型”输出结构对磁控管输出性能的影响。经优化设计后,模拟仿真结果显示,该相对论磁控管在工作电压180 kV,外加磁场0.27 T的条件下,具有200 MW的输出功率和44.3%的功率转换效率,其工作频率为2.425 GHz,输出模式为TEM模。A relativistic magnetron with a coaxial output in the S-band that operates efficiently under low magnetic field conditions has been designed for miniaturized high-power microwave devices.The lotus leaf-type output structure is used to directly extract high-frequency field energy,making the device more compact in radial size.A cathode cap is introduced at the input side to further constrain the axial drift electrons in the high-frequency field region,allowing for sufficient conversion of high-frequency field energy and achieving higher output power and conversion efficiency,while enhancing the stability of the device′s operation.A three-dimensional model is built in CHIPIC,a full electromagnetic particle simulation software,to analyze the effects of different sizes of the lotus leaf-type output structure on the output performance of the magnetron.After the optimized design,the simulation results show that this relativistic magnetron has an output power of 200 MW and a power conversion efficiency of 44.3%at an operating voltage of 180 kV and an applied magnetic field of 0.27 T.It operates at an operating frequency of 2.425 GHz,with an output mode of TEM mode.

关 键 词：高功率微波 相对论磁控管 “荷叶型”输出结构 TEM模式 全电磁粒子模拟 

分 类 号：TN123[电子电信—物理电子学]