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行波管自1943年发明以来,在五、六十年代曾取得迅速的发展,成为微波真空电子器件中最重要的管种。但是,当行波管工作频率从厘米波向毫米波推进时,由于波长大大缩短,则对设计、工艺和材料等方面的要求更为苛刻,如慢波结构尺寸更小,更严格的整管对中,高性能的聚焦磁场,更大的发射电流密度,更好的热耗散性能以及必须克服返波振荡等。加上固体器件的迅猛发展,客观上对行波管
Traveling wave tube since its invention in 1943, made rapid development in the 1950s and 1960s and became the most important type of tube in microwave vacuum electronic devices. However, as the traveling wave tube works from centiwave to millimeter wave, the requirement of design, process and materials is more harsh due to the shorter wave length. For example, the structure of the slow wave structure is smaller and the tighter tube pair Medium and high-performance focused magnetic fields, larger emission current densities, better heat dissipation and the need to overcome backwave oscillations. Coupled with the rapid development of solid state devices, the objective of the traveling wave tube