A novel high-efficiency magnetically insulated transmission line oscillator (MILO) is proposed and investigated in this article. It has three features. First of all, the widths of vanes are nonuniform while the width of resonant cavities in slow wave structure (SWS) remains unchanged. Second, the width of the first extract cavity shrinks and an extra extractor vane is added to enhance the power extraction. In addition, the emission surface of the cathode decreases, reducing the energy waste. The simulation results show that the novel high-efficiency MILO can generate high power microwave (HPM) with the output power of 6.3 GW and the frequency of 1.42 GHz when the applied voltage and current are 586 kV and 49 kA, respectively. The corresponding power efficiency is 22%. Given the same input, the conventional MILO generates the HPM with the same frequency but a lower power of 5.0 GW. The corresponding power efficiency is 17% smaller than that of our proposed MILO. Additionally, the maximum axial electric field in our proposed structure is 0.64 MV/cm after chamfering, which is lower than the breakdown threshold (1 MV/cm).

中文翻译：

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新型高效磁绝缘传输线振荡器的设计与仿真


本文提出并研究了一种新型高效磁绝缘传输线振荡器（MILO）。它具有三个特点。首先，叶片的宽度不均匀，而慢波结构（SWS）中谐振腔的宽度保持不变。其次，第一提取腔的宽度缩小，并添加额外的提取叶片以增强功率提取。此外，阴极的发射表面减小，减少了能量浪费。仿真结果表明，当施加电压和电流分别为586 kV和49 kA时，新型高效MILO可以产生输出功率为6.3 GW、频率为1.42 GHz的高功率微波（HPM）。相应的电源效率为22%。在输入相同的情况下，传统 MILO 会生成频率相同但功率较低（5.0 GW）的 HPM。相应的功率效率比我们提出的 MILO 小 17%。此外，我们提出的结构倒角后的最大轴向电场为0.64 MV/cm，低于击穿阈值（1 MV/cm）。