中文摘要：

根据螺纹波导中模式间的耦合方程组及冷腔色散方程进行了数值计算，分析了2个模式的相互耦合机理．基于圆柱形波导中线性极化TE11模式存在极化简并的特性，将线极化TE11脉冲作为1个探针，采用粒子模拟软件对该腔体进行了3维冷腔模拟；并将模拟结果与数值计算结果进行了比较，两者基本一致．通过计算机模拟得出了混合模式的电场等位线分布图，结合色散方程数值计算分析了内开槽螺纹几何特性变化对波导色散特性的影响规律．

英文摘要：

Based on the coupled equations and dispersion equation of spiral waveguide, the numerical calculation is carried out to get the dispersion line and the coupling mechanism of the two modes is analyzed. Based on the characteristics of the linear polarization TE11 mode, line polarization TE11 pulse is applied as a probe to simulate the dispersion characteristics of the cold cavity with a three-dimensional particle in cell code. The results of computer simulations agree well with the numerical calculations. Moreover, by computer simulation a mixed mode of the electric field is obtained. Combined the computer simulations with the numerical calculations, the law of influence of the dispersion characteristics by adjusting the parameters of the slotted screw geometry is obtained.