L波段端面发射高效率磁绝缘线振荡器

 建立了磁绝缘线振荡器自磁绝缘的理论模型，给出了磁绝缘电流计算公式。然后给出了非线性稳态的最大轮辐电流计算公式，并据此分析了负载限制型磁绝缘线振荡器的最大效率。提出一种新型的端面发射型磁绝缘线振荡器，在二极管电压590 kV,二极管电流为55.47 kA情况下，粒子模拟得到周期平均功率6.1 GW左右，工作主频为1.24 GHz，束波转换效率18.64%左右。端面发射型磁绝缘线振荡器的效率比负载限制型磁绝缘线振荡器的最大效率提高6%左右。端面发射的电流不参与束波互作用，由于端面发射的电流比较小，在总电流不变的情况下参与束波互作用的电流增多，从而提高了效率。最后分析了角向磁场的分布以及自磁绝缘的情况。

Analysis of L-band high-efficiency gap-current magnetically insulated transmission line oscillator

The magnetically insulated transmission line oscillator(MILO) is a crossed-field microwave tube that is closely related to the linear magnetron. The theoretical model of the self-magnetically insulated transmission line oscillator is established, and the formula of the insulating current is given. Then the formula of the maximum spoke current is given, and the maximum efficiency of the load-limited MILO is analyzed. A new type of gap-current MILO is presented. The PIC simulation shows that the steady-state value of average output power of this MILO is around 6.1 GW with an effciency of about 18.64% when the AK-gap voltage is 590 kV, the current is 55.47 kA, and the corresponding frequency is 1.24 GHz. The efficiency of the gap-current MILO is about 6% higher than that of the load-limited M