Abstract
Relativistic magnetron with diffraction output, also known as magnetron with axial extraction, is a favorite in exploring the most compact narrow band high power microwave source. For further improving power conversion efficiency and radiation pattern without diminishing the compactness, this paper proposed an efficient mode conversion configuration in an S-band π-mode operating relativistic magnetron with diffraction output. The whole device has a total length of 290mm and a maximum diameter of 260mm. In three-dimensional particle-in-cell (PIC) simulation, an optimized outcome that the power conversion efficiency can reach 43% corresponding to 4.2GW output and the radiation pattern is similar to TE11 mode is achieved.
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