本文介绍螺旋折叠圆波导慢波结构的主要特性：色散关系和互作用阻抗。
The main properties of helically wrapped circular waveguide slow wave structure, including the dispersion relation and interaction impedance, are presented.
利用简化后耦合方程解的解析式计算了螺旋波纹波导工作模式中各场幅值的比例关系。
The analytic formula of simplied coupling equation is employed to operate the rate of amplications in the work mode of helical wave-guide.
最后，由电子运动方程出发，推导出了简化了的螺旋波纹波导回旋行波管的注波互作用色散方程。
Finally, the simplified beam-wave interaction dispersion equation of Gyro-TWT with a spiral corrugated waveguide was obtained from the equations for electronic locomotion.
计算结果表明：在工作频段内螺旋波纹波导中场结构是一种混合模，以TE21模为主，其群速基本接近常数。
The result indicates that the hybrid mode can be given within work frequencies, in which the main mode is TE21. The value of group velocity of hybrid mode is a constant number.
计算结果表明：在工作频段内螺旋波纹波导中场结构是一种混合模，以TE21模为主，其群速基本接近常数。
The result indicates that the hybrid mode can be given within work frequencies, in which the main mode is TE21. The value of group velocity of hybrid mode is a constant number.
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