沟道加载矩形波导的色散特性研究  

Dispersion Characteristics of Rectangular Waveguides with Corrugations:A Theoretical Study

作　　者：朱觉远 王勇 Zhu Jueyuan;Wang Yong(Aerospace Information Research Institute,Beijing 101407,China;University of Chinese Academy of Sciences,Beijing 101407,China)

机构地区：[1]中国科学院空天信息创新研究院,北京101407 [2]中国科学院大学,北京100149

出　　处：《真空科学与技术学报》2020年第7期636-640,共5页Chinese Journal of Vacuum Science and Technology

摘　　要：提出了一种关于沟道加载矩形波导色散关系的理论分析方法并给出了相关公式。在该方法中,矩形波导和沟道中的场可以各自被精确地表示为无穷空间谐波的叠加和无穷驻波的叠加。在分界面上应用电磁场边界匹配条件可以得到一个有无穷多个方程的方程组,然后通过截断无穷序列来求解该方程组。该理论分析方法的优点是考虑了沟道宽边方向上的驻波的无穷序列的叠加。使用该理论方法所求的色散关系的结果与使用CST软件仿真的结果非常一致。The dispersion relation of the rectangle waveguides with corrugations was mathematically modeled and theoretically analyzed.The original work was that the electromagnetic(EM)fields were precisely described as the superposition of infinite spatial harmonic-waves in the rectangle waveguides,and infinite standing-waves in the corrugations,respectively.First,at all the interfaces,the system with infinite equations was derived by means of specific boundary-matching conditions;second,the equation system was numerically solved by truncation of the infinite series;and finally,the EM-field distributions and dispersion characteristics were theoretically calculated.The new model outperforms the conventional one because the superposition of infinite standing-waves in the corrugations is closer to the realistic situation.The results calculated with the newly-developed model were in good agreement with those simulated with CST microwave studio code.

关 键 词：慢波结构 沟道加载矩形波导 色散特性 场匹配 

分 类 号：TN103[电子电信—物理电子学]