In this article, we present an improved design of a bifrequency magnetically insulated line oscillator (BFMILO). We begin with design expressions for the output section parameters considering transmission line impedance across the extractor. This helps in proper impedance matching so as to maximize the RF power exchange arising out of the intense beam-wave interaction. In order to reproduce more RF energy from the space charge limiting current at the load, a metal plate is inserted inside the collector cavity depth. Two tapered extractor vanes are imposed at the load side along with the stub, to enhance the RF power extraction and proper RF coupling. Simulation results show that the modified collector design generates an RF output power of ~3.8 GW at dual operating frequencies, namely, 3.05 and 3.32 GHz. The peak power conversion efficiency was estimated as 16.17% with an applied voltage of 500 kV and a beam current of 47 kA.

中文翻译：

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S 波段双频 MILO 性能提升


在本文中，我们提出了双频磁绝缘线振荡器（BFMILO）的改进设计。我们从输出部分参数的设计表达式开始，考虑提取器上的传输线阻抗。这有助于适当的阻抗匹配，从而最大限度地提高由强烈的波束-波相互作用产生的射频功率交换。为了从负载处的空间电荷限制电流中再现更多射频能量，将金属板插入收集器腔深度内。两个锥形提取叶片与短截线一起安装在负载侧，以增强射频功率提取和适当的射频耦合。仿真结果表明，改进的集电极设计在双工作频率（即 3.05 和 3.32 GHz）下可产生约 3.8 GW 的射频输出功率。当施加电压为500 kV、束流为47 kA时，峰值功率转换效率估计为16.17%。