A relativistic magnetron with a coaxial output in the S-band that operates efficiently under low magnetic field condi-tions has been designed for miniaturized high-power microwave devices.The lotus leaf-type output structure is used to directly ex-tract high-frequency field energy,making the device more compact in radial size.A cathode cap is introduced at the input side to further constrain the axial drift electrons in the high-frequency field region,allowing for sufficient conversion of high-frequency field energy and achieving higher output power and conversion efficiency,while enhancing the stability of the device's operation.A three-dimensional model is built in CHIPIC,a full electromagnetic particle simulation software,to analyze the effects of different sizes of the lotus leaf-type output structure on the output performance of the magnetron.After the optimized design,the simulation results show that this relativistic magnetron has an output power of 200 MW and a power conversion efficiency of 44.3％at an oper-ating voltage of 180 kV and an applied magnetic field of 0.27 T.It operates at an operating frequency of 2.425 GHz,with an out-put mode of TEM mode.
关键词
高功率微波/相对论磁控管/"荷叶型"输出结构/TEM模式/全电磁粒子模拟
Key words
high power microwave/relativistic magnetron/lotus leaf-type output structure/TEM mode/full electromagnetic particle simulation
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