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Geometrical Effects on the Performance of Coaxial-Waveguide Gyrotron Traveling-Wave Amplifiers

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Abstract

This theoretical investigation examines the feasibility of improving the stability of the coaxial-waveguide gyrotron traveling-wave tube (gyro-TWT) by selecting the geometrical parameter C, i.e., the ratio of the outer radius to the inner radius. The effects of the geometrical parameter C on the start-oscillation currents of oscillation modes are analyzed to determine the optimum operating conditions. Simulation results indicate that the coaxial gyro-TWT with distributed wall losses can be stably operated at a higher beam current by optimizing C. Additionally, the saturated behaviors of the operating TE01 mode are evaluated for several C values to investigate the geometrical effects on the amplification of the coaxial gyro-TWT. Moreover, performance of the fundamental harmonic coaxial gyro-TWT achieved with the optimized C value is predicted under stable operating conditions.

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Authors and Affiliations

  1. Department of Communication Engineering, National Penghu University, Penghu, Taiwan, Republic of China

    Chien-Lun Hung

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  1. Chien-Lun Hung
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Correspondence to Chien-Lun Hung.

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Hung, CL. Geometrical Effects on the Performance of Coaxial-Waveguide Gyrotron Traveling-Wave Amplifiers. Int J Infrared Milli Waves 27, 913–921 (2006). https://doi.org/10.1007/s10762-006-9048-0

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  • DOI: https://doi.org/10.1007/s10762-006-9048-0

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