同轴交错膜片加载慢波线的分析

Study on the coaxial interlaced disc-loaded slow-wave structure

膜片加载圆波导是相对论行波管最主要的慢波结构,同轴结构的膜片加载波导可以拓宽带宽。利用变分法对同轴交错膜片加载的慢波结构(亦称同轴径向线)进行了理论分析,得到了色散方程并进行了数值计算。计算结果表明,它比非同轴结构的带宽有明显的增加。

This paper presents the coaxial interlaced disc-loaded slow-wave system of the relativistic traveling wave tube (TWT). The dispersion function of the slow-wave structure is deduced by variation method and Bessel function orthogonality without regard for thickness of disc. The paper puts much emphasis on discussing the changing of the dispersion curves following several different parameters' variety, comparing three different structures' influence upon the dispersion characteristics. The results show that this coaxial interlaced structure could make the bandwidth wider than other non-coaxial structures.