摘要
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。
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.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第6期1401-1405,共5页
Journal of Electronics & Information Technology
基金
2008年中国科学院研究生科技创新专项资助课题
关键词
速调管
杂模抑制
TM310模
接收振子天线
短路杆阵
Klystron
Parasitic-mode-suppressing
TM310 Mode
Receiving-antenna
Short-circuit-pole-array
