Author： Gong Yubin Wang Wenxiang Liu Shenggang Liu Yaowu
Publisher： Taylor & Francis Ltd
ISSN： 1362-3060
Source： International Journal of Electronics, Vol.85, Iss.5, 1998-11, pp. : 681-696
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Abstract
The travelling-wave tube is an important high-power microwave amplifier. The ridge-loaded ring-plane slow-wave structure can provide high output power in a relatively broader bandwidth. Starting from the beam-present wave equation, the dispersion relation for the interaction between the electron beam and the symmetrical mode propagating in this slow-wave circuit is obtained in this paper by means of the variational method. Making use of the Newton downhill method the numerical results of small-signal gain and phase velocity are given. The influences of the radius and current of the electron beam, the acceleration voltage and the geometrical dimension of the slow-wave structure on the smallsignal gain and phase velocity are discussed. The instantaneous operating bandwidth can be estimated from the diagrams of the relation between the gain and the frequency. This paper provides a theoretical basis for designing the ridgeloaded ring-plane travelling-wave tube.
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