Abstract
In this paper, a miniature sinusoidal slow wave structure is proposed for the development of vacuum electron terahertz radiation source. The 3D electromagnetic simulation is used to study and analyze its high frequency characteristics, and four main structural parameters are optimized. The simulation results show that the phase velocity of electromagnetic wave can be reduced by increasing the ripple depth, and the coupling impedance can be increased as well. The operating frequency is improved by reducing the length of periodical structure, and the phase velocity is reduced by increasing the width of cross section. The coupling impedance can be improved by reducing the height of electron channel. The proposed slow wave structure achieved the optimized characteristics at frequency of 300 GHz.
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