轴向输出TE10模式的紧凑型相对论磁控管的粒子模拟

研究了一种轴向输出TE10模式的紧凑型相对论磁控管，该器件采用6谐振腔结构并工作在π模式上，通过4腔轴向输出的结构设计使得谐振腔结构与矩形输出波导之间形成了较好的过渡，实现了矩形TE10模式的微波输出。与衍射输出相对论磁控管相比，这种结构设计不仅能减小磁控管的轴向和径向的尺寸，使得系统更加紧凑化，而且能在输出波导中获得更加纯净的低阶微波模式。利用粒子模拟软件，初步分析和优化了器件的工作性能。模拟结果表明：当电压为500kV，磁场为0.5T时，该器件的工作频率为2.58GHz，输出功率为1.0GW，功率转换效率达到25.0%。
A compact relativistic magnetron with axial output for TE10 mode was investigated. This magnetron with 6 resonant cavities operates at π mode and can well transit between resonant cavities and rectangular output waveguide through the structure design of 4 cavities axial output, which realizes the microwave output of rectangular TE10 mode. Compared with the magnetron with diffraction output (MDO), this design not only makes both the diameter and the axial length of the magnetron minimized so that the whole system can be more compact, but also provides a much purer output mode of a low order in the output waveguide. The operating performance of the magnetron has been analyzed and optimized by using particle-in-cell simulation software. Simulation results show that the power conversion efficiency can reach to 25.0%, corresponding to the output power of 10GW and the working frequency of 2.58GHz, under the condition of the applied voltage of 500kV and the applied magnetic field of 0.5T.