设计了一种全腔提取轴向输出相对论磁控管。在π模工作的N腔磁控管中,该结构利用磁耦合的方式通过两个相邻谐振腔在一个扇形波导内激励起TE11模,然后再由N/2个相位相同的扇形波导TE11模沿轴向向外传输。对L波段全腔提取轴向输出磁控管进行了仿真设计,在600 kV,6.3 kA的条件下,获得1.89 GW微波输出,功率转换效率50%,微波频率1.57 GHz。该结构在径向方向上仅增加一个扇形波导厚度,便于实现相对论磁控管的紧凑、高效设计。

An L band all cavity axial extraction relativistic magnetron is designed in this paper. The microwave from two adjacent cavities is coupled into an axially oriented coaxial sector waveguide through radial slots on the cavities. And two neighboring slots locate symmetrically about the center axis of the inner wall of the sector waveguide. When the magnetron operates in the π mode, the fundamental mode (TE11) will be excited in the sector waveguide. In an N cavity magnetron, N/2 coaxial sector waveguides are employed to extract microwave power. Particle-in-cell simulation is carried out to optimize the parameters of the magnetron. By employing an electron beam of 600 kV and 6.3 kA, the magnetron could generate a microwave output power of 1.89 GW, corresponding to a power conversion efficiency of 50%, and the frequency is 1.57 GHz. This is a preferred structure for a compact relativistic magnetron because only three sector waveguides are needed to be added outside the magnetron cavity.