1. Study of 220 GHz Dual-Beam Overmoded Photonic Crystal-Loaded Folded Waveguide TWT.
- Author
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Shi, Ningjie, Wang, Hexin, Xu, Duo, Wang, Zhanliang, Lu, Zhigang, Gong, Huarong, Liu, Diwei, Duan, Zhaoyun, Wei, Yanyu, and Gong, Yubin
- Subjects
TRAVELING-wave tubes ,PHOTONIC crystals ,ELECTRON beams ,ELECTRON tubes ,CRYSTAL structure ,PHOTONIC crystal fibers - Abstract
This paper puts forward a novel dual-beam overmoded folded waveguide (FW) slow-wave structure (SWS), which is loaded with photonic crystals. In this novel structure, the two electron beams pass through the small gaps between the photonic crystal structures and the FW; the dimension of the FW is twice larger than that of the fundamental mode structure. The novel dual-beam photonic crystal overmoded FW traveling-wave tube (TWT) is proposed on the basis of the SWS. And, a mode converter is introduced to achieve the connection between the SWS and the input/output structure, and the mode transformation. At the operating voltage of 21.2 kV and the operating current of 320 mA, the proposed TWT can generate 128 W of output power at 220 GHz, and its 3-dB bandwidth is 7 GHz, ranging from 216 to 223 GHz. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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