A dielectric-filled magnetically insulated transmission line oscillator

A dielectric-filled magnetically insulated transmission line oscillator (DFMILO) is presented in this paper, which introduces a low-loss dielectric to fill its resonant cavities and thus improves its technical performances. The fundamental mode frequency of the DFMILO is derived and its dispersion curve is analyzed. In simulation, high-power microwave is generated from the DFMILO with peak power of 3.1 GW, frequency of 1.467 GHz, and peak power conversion efficiency of 14.0% when the voltage is 455 kV and the current is 48.7 kA. However, the peak power conversion efficiency of the relevant unfilled MILO is only 8.5%. The comparative result shows that the filled dielectric helps to enhance the power conversion efficiency of the DFMILO. In addition, the filled dielectric contributes to decrease the MILO's dominant frequency, which means that if the dominant frequency is same, the volume of the DFMILO (especially the low-frequency DFMILO) is more compact than that of the relevant unfilled MILO. (C) 2015 AIP Publishing LLC.