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理论计算和分析了微波圆柱同轴谐振腔高阶横磁(TM)模式的系列关联参数.研究发现与圆柱腔相比,同轴谐振腔的TMn10模式有较大的模式间隔,即工作模式能够远离非工作模式的干扰,这有利于保持器件稳定的频率和功率;在保持腔长不变、腔横截面外半径取特定值时,腔内电场峰值位置的轴向特性阻抗随内径的变化存在极大值;在高频段可以采用任意大横截面的腔体结构和任意阶的模式.计算结果与仿真结果相一致.
The series of related parameters of the high-order transverse magnetic (TM) mode of the microwave cylindrical coaxial resonant cavity are calculated and analyzed theoretically. It is found that the TMn10 mode of the coaxial resonant cavity has larger mode spacing than the cylindrical cavity, Far away from the non-working mode interference, which is conducive to maintaining a stable frequency and power of the device. While keeping the cavity length unchanged and the outer radius of the cross section of the cavity taking a certain value, the axial characteristic impedance of the peak position of the electric field in the cavity varies with the inner diameter Maximum, and the cavity structure and arbitrary order modes of any large cross-section can be adopted in high frequency range.The calculated results are consistent with the simulation results.