【作者】 韩天成；

【导师】 许福永；

【作者基本信息】 兰州大学 ， 无线电物理， 2008， 硕士

【摘要】 全金属结构的皱纹波导及皱纹槽波导是慢波系统中非常重要的一类,分析其慢波特性具有重要的理论意义和现实意义。本文用模匹配法分析了矩形皱纹圆波导和矩形皱纹椭圆波导,用傅立叶级数展开慢波结构边界的方法分析了正弦皱纹椭圆波导和单边任意皱纹矩形波导,用模匹配法和傅立叶级数展开慢波结构边界相结合的方法分析了正弦皱纹圆形槽波导。对部分皱纹波导推导出了传输HE模的频散方程,重点分析了每一种皱纹波导传输TM模的慢波特性,得到了频散曲线以及通带与阻带随结构参数的变化曲线,对部分皱纹波导的衰减特性进行了分析。将本文计算结果与相关理论值做了比较与验证,所得结果对分析、设计、加工以这些结构为基础的微波器件,有重要的参考意义。通过对皱纹波导和皱纹槽波导的分析发现,慢波系统中存在一系列的离散阻带和离散通带,而且不同的结构参数对通带和阻带的影响不同,通过设定不同的结构参数,可以改变通带和阻带的中心频率及带宽,以实现在某一特定频段的滤波。因此,慢波系统不仅可以应用在高功率微波源和线性加速器中,也可以应用在微波滤波器中。更多还原

【Abstract】 All-metal structural corrugated waveguides and corrugated groove waveguides are a very important kind of slow-wave system, and the study on slow-wave characteristics of these waveguides has great theoretical and practical significance. In this paper, the rectangular corrugated circular waveguide and rectangular corrugated elliptic waveguide are analyzed by using mode-matching method. The sinusoidal corrugated elliptic waveguide and one side arbitrary corrugated rectangular waveguide are studied by expanding the boundary of slow-wave structure in Fourier series form. The sinusoidal corrugated circular groove waveguide is analyzed by combining mode-matching method and expanding the boundary in Fourier series form. Dispersion equations of some corrugated waveguides for transmitting HE mode have been derived. Slow-wave characteristics of TM mode for each corrugated waveguide are particularly analyzed. The dispersion characteristics as well as the curves of pass-band and stop-band characteristics versus structural parameters are obtained. Attenuation characteristics for some corrugated waveguides are also analyzed. The computational results have been compared and verified with related theoretical results. The obtained outcomes are of important reference significance to the analysis, design and manufacture for microwave devices based on these structures.By analyzing corrugated waveguides and corrugated groove waveguides, it is observed that there are a series of discrete pass-band and stop-band in slow-wave systems. It is also found that different structure parameters have different influence on the pass-band and stop-band. By setting different structure parameters, different central frequencies and bandwidths of pass-band and stop-band can be obtained to realize a filter of a special frequency band. So slow-wave systems can be applied not only in microwave generators with high power and linear accelerators, but also in microwave filters.更多还原