| 1. | Central conductor method
中心导体法电流贯通法 |
| 2. | The bandwidth of this kind of twt can reach 30 - 40 % if choosing the optimal parameters of the structure and the beam
因此，合理选择慢波结构几何尺寸和电子注参数，具有中心导体轴螺旋槽行波管的相对工作带宽可以达到30 ? 40 。 |
| 3. | ( b ) the linear fluid model is used to study the conductor - centered helical groove twt . we have analyzed the effects of the beam parameters on the gain and the bandwidth of the twt
( 2 )我们用线性理论模型研究了具有中心导体轴的矩形螺旋槽行波管内的注-波互作用特性，对电子注参量对小信号增益和带宽的影响进行了分析。 |
| 4. | For the first time we investigate detailedly on the theory of the conductor - centered arbitrarily - shaped helical groove structure . we divide the arbitrarily - shaped helical groove into many consecutive small rectangle area to approximate the original groove . the recurrence relation of the admittance is obtained
首次对具有中心导体轴的任意槽形螺旋槽结构的普遍理论进行了研究，通过以多层矩形阶梯来近似代替任意形状槽的边界的方法，同时对导纳的递推关系进行了详细的推导。 |
| 5. | The research on the rf characteristics of the conductor - centered helical groove sws . ( a ) in the " cold " system , we found that the changing of depth of the groove has no distinct effects on the phase velocity at the lower frequency region ; but with the increasing of the frequency , the phase velocity and bandwidth are reduced slightly , the structure is more dispersive and the coupling impedance is enhanced
对具有中心导体轴的矩形螺旋槽慢波系统的高频特性进行了理论研究： ( 1 )在冷系统中的研究结果表明：频率较低时，槽深的改变对相速的影响不是很大，随着频率的增大相速略有减小，同时带宽也有所减小，色散变得稍强，耦合阻抗增大。 |
| 6. | In this dissertation , we have made detailed theoretical study and numerical computing on some new types of helical groove sws including the conductor - centered rectangle - shaped helical groove and the conductor - centered arbitrarily - shaped helical groove ; several important new conclusions and valuable results are achieved and listed as the followings : 1
本论文从理论研究和数值计算两方面对一类新型的具有中心导体轴的矩形螺旋槽慢波系统以及我们提出具有中心导体轴的任意槽形螺旋槽慢波系统进行了深入的研究。主要工作成果和创新点在于： 1 |
| 7. | The dispersion equation and the coupling impedance expressions of the conductor - centered arbitrarily - shaped helical groove structure are presented for the first time ; based on these theories , the effects of the groove shape on rf characteristics of the structure are investigated by numerical calculation
首次提出了具有中心导体轴的任意形状螺旋槽慢波结构的色散方程和耦合阻抗表达式；并在这些理论的基础上通过数值计算详细研究了槽形状对螺旋槽慢波系统高频特性的影响。 |
