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一 引言 目前国外越来越多用纵向加载条来拓宽行波管频带,国内亦已开始运用。但在我们看到的国外资料中,对于纵向加载条数目,宽度等对色散特性影响均未给出,Palk计算带有纵向加载条螺旋线色散的文章中,亦没有给出这方面影响,只不过在计算电容耦合系数时,把加载条数处看成是一个屏闭筒,而计算电感耦合系数时,又把屏闭筒放在管壳内壁处,其模型如
I. INTRODUCTION At present, more and more foreign countries use the longitudinal loading bar to broaden the traveling-wave tube frequency band and have started to use it domestically. However, in the foreign materials we have seen, the influence of the number and width of the longitudinal loading bars on the dispersion characteristics is not given. This effect is not given in the article by Palk for calculating the dispersion of the spiral with longitudinal loading bars However, in the calculation of capacitive coupling coefficient, the number of load at a place as a closed screen cylinder, and the calculation of the inductive coupling coefficient, the screen closed cylinder on the wall of the shell, the model such as