以下为句子列表：
英文: Due to its advantages of high power capacity, weak dispersion, easier fabrication and low ohmic losses, the folded rectangular groove guide would be an excellent slow-wave structure in millimeter and submillimeter wave TWTs.
中文: 曲折矩形槽波导结合了曲折波导散热能力强、色散特性好、容易加工和矩形槽波导单模工作、低损耗、大尺寸等优点，因此这种新型的慢波系统有可能在毫米波及亚毫米波段的行波管中具有较好的发展前景。
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英文: The profile of arbitrary shaped groove is approximated by a series of rectangular steps and the hotdispersion equation of the coaxial arbitrary-shaped-groove slow-wave structure is derived by the self-consistent theory.
中文: 摘要用阶梯近似的方法分析任意槽形加载的圆波导慢波系统中的场，采用自洽场理论，得到了任意槽形周期加载圆波导慢波系统在小信号条件下的“热”色散方程，并对结构参数对小信号增益的影响情况进行了研究。
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