高功率多注速调管TM310模圆柱形谐振腔杂模抑制方法

该文针对TM₃₁₀模(主模)圆柱形谐振腔提出了一种新的杂模抑制方法。为抑制与主模相邻的低次杂模TM₀₂₀,采用在谐振腔中放置接收振子天线的方法,并推导了放入接收振子天线后,模式频率变化量的表达式。由此发现：模式频率变化量仅依赖于该模式在接收振子天线处的电场强度,而与其磁场无关;通过适当调整接收振子的位置,可使主模和TM₀₂₀ 模具有不同的频率变化量,从而能增大模式之间的频率间隔,避免TM₀₂₀ 模对主模的干扰。另外,为抑制与主模相邻的杂模TM⁺₃₁₀,采用了在谐振腔中放置短路杆阵的方法。利用CST-MWS软件对X波段此类谐振腔进行了模拟计算,验证了该方法的有效性。

Parasitic-Mode-Suppressing Method in TM310-Mode Cylindrical Resonator for High Power Multi-beam Klystron

A new parasitic-mode-suppressing method for TM₃₁₀ mode (operating mode) cylindrical resonator is presented in this paper. In order to suppress TM₀₂₀ mode, a receiving-antenna is set into the resonator, and then the expression for frequency offset is derived based on the electromagnetic theory. Furthermore, two conclusions can be obtained from the formula: frequency offset of a mode only depends on the mode’s electric field in the position of the receiving-antenna; setting the antenna suitably can make frequency offsets of TM₃₁₀ mode and TM₀₂₀ mode differently, so the frequency interval between TM₃₁₀ mode and TM₀₂₀ mode may be enlarged, which helps avoid the interference of TM₀₂₀ mode in the TM₃₁₀ mode resonator. On the other hand, short-circuit- pole-array set into the resonator is used to suppress the TM⁺₃₁₀ mode. By means of CST-MWS, this kind of resonator in X-band is simulated, which shows the availability of the parasitic-mode-suppressing method.