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给出了两种色散方程并研究了该波导各模式截止频率与芯区手征导纳的关系。
Two kinds of dispersion equations are given and the relation between the cutoff frequency and core chiral admittance is studied.
采用模匹配方法分析了月形波导和加片圆波导的截止频率。
The Lunar waveguides and vained circular waveguides are analyzed by using the mode matching method.
理论研究结果表明：对于同样等效直径的矩形谐振管，其截止频率远大于圆形谐振波导管的截止频率；
The results show that the cutoff frequency of the rectangular waveguide tube with the same equivalent radius is far greater than that of the cylindrical tube.
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