Design and development of high linearity millimeter wave traveling-wave tube for satellite communications
He Jun†, Huang Ming-Guang, Li Xian-Xia, Li Hai-Qiang, Zhao Lei, Zhao Jian-Dong, Li Yue, Zhao Shi-Lei
       
(a) Sketch of a section of SWS; (b) loss profile and different pitch profiles of the K-band TWT.