相对论磁控管谐振模式的模式分解研究

Research on the mode of relativistic magnetron

随着磁控管的发展,磁控管中的模式关系变得愈发复杂,模式间的竞争也愈发激烈。为了更好地进行磁控管的模式研究,基于本征模的正交性,推导并提出了一种模式分解的方法,并以A6型相对论磁控管作为研究对象,对其不同振荡状态下的工作场进行了模式分解的应用。结果表明,相对论磁控管振荡时,将会出现多模共存的现象,且磁控管将会振荡在成分最高的本征模频率上。同时,结果中展现了简并模式同时存在,以同趋势振荡的现象,结合PIC模拟方法,确定了具有径向输出结构的相对论磁控管能够在简并模式振荡的情况下,能够实现稳定的输出。

As the mode competition of magnetrons becomes more intense,to better study the mode of magnetron,a mode decomposition method is proposed in this paper,and the A6 relativistic magnetron is selected as the research object.The results of mode decomposition show that when the relativistic magnetron oscillates,there will be a phenomenon of multi-mode coexistence,and the magnetron will oscillate at the frequency of the eigenmode with the strongest field strength.At the same time,the results show that the degenerate mode coexists and oscillates in the same trend.Combined with PIC simulations,it can be inferred that the relativistic magnetron with radial output structure can operate at the degenerate mode and obtain stable output signal.