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寻求频带更宽、输出功率更大、体积更小的螺旋线行波管一直是研制工作的目标,二次谐波是影响宽带行波管工作的重要因素,本文对不同形式介质加载的螺旋线慢波结构进行了模拟,并对其中色散曲线最为平坦的钮销慢波结构进行了一维大信号模拟,证明改变螺距或夹持介质形状可有效展宽带宽、降低二次谐波功率。
Seeking wider frequency band, larger output power and smaller volume of spiral traveling wave tube has always been the goal of research and development. The second harmonic is an important factor affecting the performance of broadband traveling wave tube. In this paper, different types of media loaded spiral Slow wave structure is simulated and the one-dimensional large-signal simulation of the slow-wave structure of the knob with the flattest dispersion curve is performed. It is proved that changing the pitch or holding the medium shape can effectively broaden the bandwidth and reduce the second-harmonic power.