Simulation of a G-band sheet beam backward wave oscillator with double staggered metallic rod array

Liu, Guo and He, Wenlong and Cross, Adrian W. and Yin, Huabi and Bowes, David (2013) Simulation of a G-band sheet beam backward wave oscillator with double staggered metallic rod array. Journal of Physics D: Applied Physics, 46 (34). 345102. ISSN 0022-3727 (https://doi.org/10.1088/0022-3727/46/34/345102)

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Abstract

Backward wave oscillators (BWO) are promising high-power portable radiation sources in the terahertz frequency range. A G-band (140-220 GHz) sheet beam BWO based on a double staggered metallic rod array as the slow wave structure (SWS) has been designed and presented in this paper. The novel SWS allowed extension of the interaction area for the sheet beam with a uniform electric field if the height of the rod array is properly chosen. This could alleviate beam instability problems in the sheet beam transportation and potential parasitic oscillations. Moreover, a relatively broad bandwidth can be achieved due to its special dispersive properties. Particle-in-cell simulation had predicted that the G-band sheet beam BWO with the improved non-uniform double staggered metallic rod array can achieve output power of over 110 W in a continuous frequency tuning range of 186.3-227.2 GHz (relative bandwidth 20%) with a maximum electronic efficiency of 2.8% by using a 200 mA sheet beam and adjusting the beam voltage from 20 to 40 kV.

  • Item type:Article
    ID code:50260
    Dates:
    Date
    Event
    28 August 2013
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:11 Nov 2014 10:07
    Last modified:08 Apr 2024 21:49
    URI:https://strathprints.strath.ac.uk/id/eprint/50260
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