A Tapered Ridge-loaded Folded Waveguide Slow-wave Structure for Millimeter-wave Traveling-wave Tube |
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| Authors: | Guo Guo Yanyu Wei Lingna Yue Yubin Gong Xiong Xu Jun He Guoqing Zhao Wenxiang Wang Gun-Sik Park |
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| Affiliation: | (1) National Key Laboratory of Science and Technology on Vacuum Electronics, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China;(2) Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190, China;(3) Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea; |
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| Abstract: | This paper presents a tapered ridge-loaded folded waveguide (FWG) slow-wave structure (SWS) for broadband and high power millimeter
wave traveling wave tube (TWT). The radio-frequency characteristics including dispersion properties, interaction impedance,
S-parameters are analyzed. And based upon these results, the nonlinear large signal performance of the tapered ridge-loaded
folded waveguide TWT working in W-band is simulated by 3-D particle-in-cell code. In the same ridge length, the tapered FWG
has lower reflection and radio-frequency loss than the normal ridge-loaded FWG. Besides, the tapered ridge-loaded FWG TWT
also has higher electron efficiency and larger bandwidth, which is more suitable for millimeter-wave TWT. |
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