平面磁绝缘线振荡器的作用机理及模拟设计

针对当前高功率微波(HPM)中的热点器件磁绝缘线振荡器(MILO) 频率低、效率低等问题，提出了一种可以沿x方向平面展开的平面MILO。该器件也是一种低阻抗高功率微波器件，通过一个低外加磁场来代替常规MILO中的磁绝缘电流，辅助实现器件的磁绝缘，从而实现器件效率的提高。结合PIC模拟，建立一个外加低磁场的C波段平面MILO，并根据其慢波结构(平面折绉表面)特点给出相应的色散曲线，确定微波器件工作点，利用2.5维全电磁粒子模拟软件对其进行数值模拟，在输入为4.0 GW电功率(工作电压约800 kV)的条件下，模拟得到频率为6.56 GHz的微波输出，通过优化外加磁场，使得模拟微波输出功率达到1.22 GW，功率效率在C波段条件下超过30%。

Mechanism and design of planar magnetically insulated transmission line oscillator

A new type of magnetically insulated transmission line oscillator (MILO)-planar MILO is put forward to solve the low frequency and low efficiency problems of MILO. The new device can be expanded along the x direction of the plane and it is also a microwave tube with low impedance and high power. The planar MILO uses a low external magnetic field to take the place of conventional magnetic insulation magnetic field so that we can enhance the efficiency of the microwave output. Through numerical calculation, the impacts of several structure parameters of the planar MILO coaxial SWS with plane-wrinkle surface on its high frequency characteristic are analyzed. Then the external magnetic is further optimized with 2.5 dimensional particle-in-cell simulation. High power microwaves generated from the planar MILO have the average output power of 1.22 GW, central frequency of 6.56 GHz and efficiency of 30%, when the beam voltage is 800 kV.