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本文研究一种用于W波段高功率微波源的新型径向波慢波结构腔。这种径向慢波结构腔在大的半径情况下,能够通过几十吉瓦功率的大电流,适合于吉瓦级的高功率微波源。它是对称结构,能够比较方便地采用二维半软件做电磁场和粒子模拟计算分析,将在高功率微波器件中得到广泛地应用。文中分析了慢波结构中的电磁场分布特点,在大尺寸情况近似下,得到了对称场分布的色散特性。并由数字计算实验方法验证了理论分析结果。
In this paper, a new type of radial-wave slow-wave structure cavity for W-band high power microwave sources is studied. This radial slow-wave structure cavity can pass high current of tens of gigawatts at large radius and is suitable for high-power gigawatt microwave sources. It is a symmetrical structure, can be more convenient to use two-dimensional semi-software for electromagnetic field and particle simulation calculation and analysis, will be widely used in high-power microwave devices. In this paper, the characteristics of the electromagnetic field distribution in a slow-wave structure are analyzed. The dispersion of a symmetric field distribution is obtained under the approximation of a large-size case. The results of theoretical analysis are verified by numerical calculation method.