摘要
本文提出了矩形π-TM310双间隙腔加载同轴滤波器型宽带输出电路,并对其可行性进行了论证,对高次模双间隙腔中非工作模式的干扰程度和同轴线输出电路的功率容限等重要问题做了定量分析.我们通过调整矩形双间隙腔的长宽比例并采用凹入结构,明显扩大了π-TM310模与相邻非工作模的频率间隔,有效抑制了非工作模式的干扰;又采用了非常规的电子注孔布局,使各个电子注孔的特性阻抗更均匀,而且在加载同轴滤波器之后仍然很均匀.研究结果表明,经过优化设计的矩形π-TM310双间隙腔加载同轴滤波器型输出电路具有很宽的输出频带,在X波段相对带宽达到14%左右.但由于π模双间隙腔与同轴线的耦合口较小,而且该处还有短路销钉,导致其输出功率容限较低,约为几百kW.因此,该类输出电路比较适合于X波段或更高频段的中功率宽带多注速调管.
A new kind of broadband output circuit of rectangular π-TM310 mode double-gap cavity loaded by coaxial line fil-ter is propounded and its feasibility is demonstrated.Some attention-getting cruxes,such as the influence of adjacent modes on the gap impedances and the power capacity of the coaxial line output circuit,are discussed.Smaller length-width ratio and a concave structure of rectangular cavity are adopted to magnify the frequency interval between the π-TM310 mode and adjacent modes.Then the disturbance from non-working modes can be effectively suppressed.The beam holes are disposed on novel but suitable positions so that the characteristic impedances along different beam holes are more uniform,and remain uniform after the rectangular π-TM310 mode double-gap cavity is loaded by a coaxial line filter.Our research results show that the optimum designed output circuit of rect-angular π-TM310 mode double-gap cavity loaded by coaxial line filter has a very wide band.The relative bandwidth in X band reach-es 14% or so.But the output power capacity is relatively low,about a few hundreds of kW,because the cavity＇s coupling hole with the coaxial line is relatively small,furthermore,in which there is a metal pin.So the output circuit is fit for medium power broad-band multi-beam klystrons of X band or higher frequency.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2010年第3期725-730,共6页
Acta Electronica Sinica
基金
国家自然科学基金(No.60671060)
广东工业大学校内科研基金(No.405085039)
关键词
多注速调管
高次模
双间隙腔
宽带输出电路
同轴滤波器
multi-beam klystron
high order mode
double-gap cavity
broadband output circuit
coaxial line filter
