Abstract
This paper reports a Ka-band sheet beam traveling wave tube (TWT) focused by a 0.2 T closed periodic cusped magnet (PCM) system. The TWT with one section of staggered double-vane slow-wave structure (SWS) is driven by a 0.8-A sheet beam with rectangular cross-sectional area of 3.2 mm × 0.6 mm. This sheet beam TWT can produce 100 W output power, and the 3 dB band is 33–38.5 GHz. In order to improve the output power, an optimized sheet beam TWT with two sections of SWSs focused by a novel closed PCM system is proposed. The new closed PCM system is with annular magnetic blocks and can be fabricated and adjusted easily. The simulation shows that the optimized sheet beam TWT can produce 2000 W output power and the 3 dB band ranging from 33 to 40 GHz.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China under (Grant Nos. 61531010, 61371052 and 61471091) and by the National Key Lab Foundation of China (Grant Nos. 2014-764.XY.K and CEMEE2015Z0101B).
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Wang, ZL., Shi, X., Gong, YB. et al. Study on Ka-Band Sheet Beam Traveling Wave Tube Focused by Closed PCM. J Infrared Milli Terahz Waves 37, 561–571 (2016). https://doi.org/10.1007/s10762-016-0247-z
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DOI: https://doi.org/10.1007/s10762-016-0247-z