基于损耗介质加载波导回旋行波放大器的多模稳态分析

发布时间：2018-02-27 04:15

本文关键词： 回旋行波管多模稳态理论返波振荡模式竞争和抑制损耗介质　出处：《真空科学与技术学报》2017年04期 　论文类型：期刊论文

【摘要】：目前回旋放大器的稳定性分析主要采用单模理论,而该理论不能分析模式间的相互影响。多模稳态理论可以分析不同模式间的相互影响,现有的多模理论仅可以分析光滑波导或内壁加载石墨涂层的波导结构,该结构并不适合高平均功率工作。本文首次将回旋行波放大器的多模稳态理论应用于适合于高平均功率的损耗介质加载波导模型,并分析了回旋返波振荡的存在对工作模式的影响。以TE_(01)模基波工作的Ka波段回旋行波管为例,研究介质损耗正切和输入功率的变化对回旋返波振荡的抑制作用。相较于使用PIC仿真方法,利用多模理论,可以快速地分析工作模式得到稳定放大的过程。
[Abstract]:At present, the stability analysis of gyroscope amplifier mainly adopts the single-mode theory, but the theory can not analyze the interaction between modes. The multi-mode steady-state theory can analyze the interaction between different modes. The existing multimode theory can only analyze the structure of smooth waveguide or graphite-coated waveguide with inner wall. This structure is not suitable for high average power operation. In this paper, the multimode steady-state theory of gyrotron traveling wave amplifier is first applied to the lossy dielectric loaded waveguide model suitable for high average power. The influence of gyrotron back wave oscillation on the operating mode is analyzed. Taking the Ka-band gyrotron traveling wave tube operating in the fundamental mode of TECs as an example, The suppression of cyclotron back wave oscillation by the change of dielectric loss tangent and input power is studied. Compared with the PIC simulation method and the multimode theory, the stable amplification process of the working mode can be analyzed quickly.
【作者单位】：中国科学院电子学研究所高功率微波源与技术重点实验室;中国科学院大学;中国电子科学研究院;
【分类号】：TN124;TN722

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