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International journal of electronics, 2018-02, Vol.105 (2), p.348-360
2018

Details

Autor(en) / Beteiligte
Titel
An effective method to increase bandwidth of EIK at 0.34 THz
Ist Teil von
  • International journal of electronics, 2018-02, Vol.105 (2), p.348-360
Ort / Verlag
Abingdon: Taylor & Francis
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
  • To increase the bandwidth of Extended Interaction Klystron (EIK) at 0.34 THz, the method of staggered tuning on cavities' configurations is proposed. Based on the analysis of phase relationship between gap voltage and the bunched beam, the buncher cavities in EIK are reasonably staggered-tuned to achieve various resonance frequencies, which is helpful to flat the gain response of the whole device. The characteristics of output cavities with different numbers of gaps are then researched and the issue of start current for the self-oscillation mode is also involved, leading to the optimum number of gaps to enhance the interaction and avoid the instability. By comparing the performances of various typical stagger-tuned models, the final configuration is accordingly confirmed. Particle-in-cell simulation is eventually applied to study performance of the optimised structure, whose gain is 34.8 dB in peak and −3 dB bandwidth reaches about 500 MHz, which is double that of the synchronous-tuned structure.

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