[2] Barker R J, Schamiloglu E. Highpower microwave sources technologies[M]. New Yk: IEEE Press, 2001

[3] Korolyov A N, Gelvich E A, Zhary Y V. Multiple-beam klystron amplifiers: performance parameters and developoment trends[J]. IEEE Trans Plasma Science, 32, 1109-1118(2004).

[7] Frank K, Ivo T. Three-dimensional simulations of frequency-phase measurements of arbitrary coupled-cavity RF circuits[J]. IEEE Trans Electron Devices, 35, 2018-2026(1988).

[9] Song L, Ferguson P, Ives R L, et al. Development of an XB, 50 MW, multiple beam klystron[C]The 5th International Vacuum Electronics Conference. 2004: 286287.

[11] Liu Zhenbang, Huang Hua, Jin Xiao. Design of an X-band gigawatt multibeam relativistic klystron amplifier[J]. IEEE Trans Plasma Science, 42, 3419-3422(2014).

[12] Liu Zhenbang, Huang Hua, Lei Lurong. Investigation of an X-band gigawatt long pulse multi-beam relativistic klystron amplifier[J]. Physics of Plasmas, 22, 093105(2015).

[13] Liu Zhenbang, Huang Hua, Jin Xiao. Investigation of the phase stability of an X-band long pulse multibeam relativistic klystron amplifier[J]. Physics of Plasmas, 23, 093100(2016).