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利用模拟软件和数值计算方法,对感性加载大间隙速调管谐振腔的高频特性进行了分析,结果表明:增加膜片数量对减弱间隙空间效应的贡献有限,而一旦加载感性回流支撑杆,即使只填充4个膜片,已能基本消除空间电荷效应;由于回流杆的电感和谐振腔的固有电感可比较,导致谐振频率相对提高达9%;与对谐振频率的影响相比,回流杆尺寸对谐振腔电场分布的影响要小得多;而对于经过频率优化的谐振腔,回流杆尺寸对放大器工作特性的影响基本可以忽略.应用以上结论设计出的感性加载大间隙速调管放大器,能稳定提取约1.13GW的微波功率,功率效率约38%.
The high frequency characteristics of inductively loaded large klystron resonators were analyzed by using the simulation software and numerical methods. The results show that the contribution of increasing the number of diaphragms to the space effect of reducing the interspaces is limited. Once the inductive backflow bar is loaded, Even if only four diaphragms are filled, the space charge effect can be basically eliminated. Since the inductance of the return bar and the intrinsic inductance of the resonant cavity are comparable, the resonant frequency is relatively increased by 9%. Compared with the effect on the resonant frequency, the return bar The size of the resonant cavity electric field distribution is much smaller; and for the frequency-optimized resonator, the effect of the size of the return bar on the operating characteristics of the amplifier can be neglected.Using the above conclusions designed inductively loaded klystron amplifier, Can stably extract about 1.13GW microwave power, power efficiency of about 38%.