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以周期边界法、谐振法以及微扰法分别对盘荷波导结构色散特性、耦合阻抗进行分析,研究了不同结构参数下盘荷波导结构高频特性的变化规律。设计了C波段π/2模速调管盘荷波导输出结构,对其注-波互作用开展了PIC粒子模拟。计算结果表明,相对于传统单间隙圆柱输出腔,盘荷波导输出结构可以在获得高效率的同时显著降低输出间隙场强。
The periodic dispersion method, the resonance method and the perturbation method are respectively used to analyze the dispersion characteristics and the coupling resistance of the waveguide structure. The variation of the high frequency characteristics of the waveguide structure with different structural parameters is studied. The output structure of C-band π / 2 kvar waveguide was designed and the PIC particle simulation was carried out for the note-wave interaction. The calculation results show that compared with the traditional single-gap cylindrical output cavity, the output structure of the disk-load waveguide can significantly reduce the output gap field strength while achieving high efficiency.