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中文摘要：
提出了一类新型毫米波大功率微波器件——脊加载曲折波导行波管,推导出了引入电子注后的＂热＂色散方程.通过数值求解此方程,研究了加脊尺寸和电子注参数对小信号增益影响.计算结果表明：通过适当的尺寸设计和工作参数的选择,此结构在Kα波段具有18.51%的3dB增益带宽和1.15dB/周期的增益;相比于常规曲折波导结构,脊加载结构在保证一定带宽的情况下,具有更高的增益和电子效率;为了进一步提高增益,可以适当增加脊宽度和高度,也可在一定范围内增加电子注电流.
英文摘要：
A novel mm-wave high power microwave device,the ridge-loaded folded waveguide traveling wave tube （TWT）,is presented and its linear gain properties are investigated. The perturbed dispersion equation is derived and the small signal growth rate is calculated for different dimensions of ridge and parameters of electron beam. For a cold beam,the linear theory predicts a gain of 1. 15 dB /period and a 3-dB small-signal gain bandwidth of 18. 51% in Kα-band. The investigation reveals that,with the same beam parameters,the novel slow-wave structure （SWS） has advantage over the folded waveguide SWS in its gain and efficiency. The dimensions of ridge and the beam current may be increased in order to raise the gain.
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