Dispersion Characteristics of Coaxial Circular-Arc-Groove Slow-Wave Structure |
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Authors: | Lingna Yue Wenxiang Wang Yanyu Wei and Yubin Gong |
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Institution: | (1) National Key Laboratory of High Power Vacuum Electronics School of Physical Electronics, University of Electronic Science and Technology of China, 610054 Chengdu, Sichuan, China |
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Abstract: | The coaxial circular-arc-groove periodic slow-wave system for relativestic traveling wave tubes (RTWT) is presented in this paper. To analyze the field in the groove region, the continuous profile of the circular arc is approximately replaced by a series of rectangular steps and the field continuity at the neighboring steps is deduced. The dispersion equation of the coaxial circular-arc-groove slow-wave structure is derived by the matching conditions at the interface between the groove region and central region. The influence of various circuit parameters on the dispersion relation is investigated by the numerical calculation. |
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Keywords: | Relativistic traveling wave tube coaxial circular-arc-groove slow-wave structure dispersion relation |
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