Modes In Coaxial Cavity Research Articles

Investigation on eigenvalues of TM modes in coaxial cavity with inner-outer corrugations

Here we present a detailed study on eigenvalues for TM modes. In order to achieve enough accuracy, the spatial harmonics method (SHM) is used to derive the eigenfunction of TM modes in the coaxial cavity with both inner and outer corrugations. After that, the equations can be numerically solved with some constraints. Meanwhile, the influences of the variations of the corrugation parameters on the eigenvalues of TM modes are analyzed carefully, which is helpful for us to learn the distribution rule of the TM modes. In addition, the differences and similarities between TM and TE modes are studied comprehensively to select the suitable mode in the coaxial cavity. The numerical results are presented in this paper, the comparisons are also made with the published results.

Klystron Output Circuit of High Order Transverse Magnetic Mode in Coaxial Cavity Loaded with Waveguide Filter

摘要: 该文设计了工作于高阶横磁TM310模式单间隙封闭圆柱同轴腔。在输出矩形波导内设计了横向电感滤波膜片的新型结构。用模拟场分析法计算了腔内6个漂移管中心处间隙阻抗平均值的频率特性。模拟和计算发现，该结构模式输出回路的间隙阻抗平均值随频率的变化出现双峰曲线。这表明，采用滤波膜片波导的输出带宽比采用空波导情形的带宽有明显的增加。 关键词: 多注速调管 / 同轴谐振腔 / 高阶横磁模 / 间隙阻抗 / 输出带宽 / 滤波器加载输出回路

Research on parameters of higher-order transverse magnetic modes in cylindrical coaxial cavity resonator

The inter-related parameters of higher order transverse magnetic (TM) modes in coaxial cavity are calculated and analyzed. It is found that TMn10 modes have large mode intervals. There exists a maximum characteristic impedance while keeping the specific cavity outer radius constant. Large cross-section cavity can be employed in higher frequency range. The solutions show good agreement with the results simulated by ISFEL 3-demention and HFSS, softwares used for electromagnetic simulation. The results calculated can serve as a database from which the optimum seeking in design can be gotten instantly instead of the time-consuming simulation by trial and error.