论文部分内容阅读
基于高效率双频段毫米波螺旋线慢波结构的设计,探讨了影响返波振荡起振长度的因素。在相速度跳变/渐变结构的输入段引入了相速渐变段,增大了返波振荡的起振电流,设计出了一种新型可抑制返波振荡的螺距分布结构。采用此结构,优化之后使得双频段Ka(33~36 GHz)波段和Q(43.5~46.5GHz)波段的返波增益在返波方向均小于15 d B,从而抑制了返波振荡。
Based on the design of a high efficiency dual-band millimeter-wave helix slow-wave structure, the factors affecting the onset of back-wave oscillation are discussed. A phase velocity gradient was introduced into the input section of the phase velocity jump / gradient structure and the starting current of the return wave oscillation was increased. A new pitch distribution structure was designed to suppress the return wave oscillation. With this structure, after the optimization, the back-wave gain in the band of 33 GHz to 36 GHz and the band of 43.5 GHz to 46.5 GHz in both bands is less than 15 dB in the return wave direction, and the back-wave oscillation is suppressed.