[1] Chodorow M, Kulke B. An extended-interaction klystron: Efficiency and bandwidth[J]. IEEE Transactions on Electron Devices, 13, 439-447(1966).

[2] Steer B, Roitman A, Horoyski P et al. Advantages of the Extended Interaction klystron Technology at Millimeter and Sub-Millimeter Frequencies[C](2007).

[3] Yu D U L, Wilson P B, Kin J S. Design of a high-power sheet beam klystron[C](1992).

[4] Pasour J, Wright E, Nguyen T K et al. Demonstration of a Multikilowatt, Solenoidally Focused Sheet Beam Amplifier at 94 GHz.[J]. IEEE Transactions on Electron Devices, 61, 1630-6(2014).

[5] Gamzina D, Barnett L R, Ravani B et al. Mechanical Design and Manufacturing of W-Band Sheet Beam Klystron[J]. IEEE Transactions on Electron Devices, 64, 2675-2682(2017).

[6] Shin Y M, Wang J X, Barnett L R et al. Particle-In-Cell Simulation Analysis of a Multicavity W-Band Sheet Beam Klystron[J]. IEEE Transactions on Electron Devices, 58, 251-258(2011).

[7] Nguyen K T, Pasour J A, Antonsen T et al. Intense Sheet Electron Beam Transport in a Uniform Solenoidal Magnetic Field[J]. IEEE Transactions on Electron Devices, 56, 744-752(2009).

[8] Booske J H, Mcvey B D, Antonsen T M. Stability and confinement of nonrelativistic sheet electron beams with periodic cusped magnetic focusing[J]. Journal of Applied Physics, 73, 4140-4155(1993).

[9] Lopin M I, Pobedonostsev A S, Sazonov B V. High-power multiple beam TWTs and the TWT-based amplifying chains[C](1992).

[10] Gelvich E A., Borisov L M., Zhary Y V et al. The new generation of high-power multiple-beam klystrons[J]. Microwave Theory and Techniques, IEEE Transactions on Electron Devices, 41, 15-19(1993).

[11] Pobedonostev A S, Gelvich E A, Lopin M I et al. Multiple-beam microwave tubes[C](1993).

[12] Su-Ye LÜ, ZHANG Chang-Qing, WANG Shu-Zhong et al. Stability Analysis of a Planar Multiple-Beam Circuit for $W$-Band High-Power Extended-Interaction Klystron[J]. IEEE Transactions on Electron Devices, 62, 3042-3048(2015).

[13] Dobbs R, Roitman A, Horoyski P. 9.2: Fabrication techniques for a THz EIK[C](2010).

[14] WANG Dong-Yang, WANG Guang-Qiang, GUO Jian et al. A high-order mode extended interaction klystron at 0.34 THz.[J]. Physics of Plasmas, 24, 1-8(2017).

[15] Chodorow M, Wessel-Berg T. A High-Efficiency Klystron with Distributed Interaction[J]. IRE Transactions on Electron Devices, 8, 44-55(1961).