A 2.5-D frequency-domain nonlinear computer model of coupled-cavity traveling wave tubes. Issue 5 (26th August 2014)

• Record Type: Journal Article
• Authors: Bai, Chun-Jiang; Li, Jian-Qing; Hu, Yu-Lu
• Is Part Of: Compel. Volume 33:Issue 5(2014)
• Page Start: 1777
• Page End: 1793
• Publication Date: 2014-08-26
• Subjects: Electromagnetic CAD -- Coupled-cavity traveling wave tubes -- Electromagnetic waves; Electrical engineering -- Data Processing -- Periodicals; Electrical engineering -- Mathematics -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Data Processing -- Periodicals; Electronics -- Mathematics -- Periodicals; 621.3
• DOI: 10.1108/COMPEL-09-2012-0156
• Languages: English
• ISSNs: 0332-1649

Abstract

Abstract : Purpose: – The purpose of this paper is to present a 2.5-dimensional (2.5-D) frequency-domain nonlinear computer model for the beam-wave interaction of coupled-cavity traveling wave tubes (CC-TWTs). Design/methodology/approach: – MKK (proposed by Malykhin, Konnov, and Komarov) equivalent circuit model is used to describe the coupled-cavity slow-wave structure. And the losses are taken into account in the MKK equivalent circuit. Instead of one-dimensional (1-D) disk model, the electron beam is divided into a set of discrete rays and the electron dynamics are treated using the three-dimensional (3-D) Lorentz force equations. Findings: – The simulated result obtained show that the computer model can give a good predict for CC-TWTs in V-band. Practical implications: – The computer model is capable of treating nonlinear problems. Compared with particle-in-cell simulation, the 2.5-D frequency-domain computer model spends less time. Besides, the 3-D electron trajectory can be used to design high-efficiency collectors for CC-TWTs. Originality/value: – The computer model is able to simulate nonlinear problems of coupled-cavity TWT faster.