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相对于径向输出相对论磁控管而言,轴向输出相对论磁控管具有结构紧凑、高阻抗、角向均匀性、工作模式稳定以及高功率输出等一系列优点。但由于外加磁体对轴向输出端半径的限制,导致真空室的轴向长度大于磁控管的轴向长度,为了实现工程应用,一段较短的轴向输出过渡段被设计。文中主要是通过仿真软件仿真找到较为有效的过渡段设计以实现在S波段π模工作模式下的轴向输出相对论磁控管的能量有效输出。整个器件的轴向输出段的总长度为378 mm,输出端圆柱波导的半径为73.8 mm。在三维粒子模拟下得到一种较为有效的过渡段结构,功率转换效率为28.7%,相应的输出功率为1.371GW,辐射模式为TE_(01)模。
Relative to the radial output of relativistic magnetrons, axial output relativistic magnetrons with a compact, high impedance, angular uniformity, stable mode of operation and high power output and a series of advantages. However, the axial length of the vacuum chamber is larger than the axial length of the magnetron due to the limitation of the applied magnet on the axial output radius. A shorter axial output transition is designed for engineering applications. In this paper, we mainly find the effective transition section design through simulation software simulation in order to realize the energy output of axial output relativistic magnetron in the mode of π-mode of S-band. The total length of the axial output section of the entire device is 378 mm and the radius of the output cylindrical waveguide is 73.8 mm. In the three-dimensional particle simulation, a more effective transition segment structure was obtained. The power conversion efficiency was 28.7%, the corresponding output power was 1.371GW, and the radiation mode was TE 01 mode.