1. Study of the Symmetrical Microstrip Angular Log-Periodic Meander-Line Traveling-Wave Tube.
- Author
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Wang, Shaomeng, Gong, Yubin, Wang, Zhanliang, Wei, Yanyu, Duan, Zhaoyun, and Feng, Jinjun
- Subjects
TRAVELING-wave tubes ,MAGNETIC coupling ,ELECTRON beams ,MICROSTRIP transmission lines ,DISPERSION (Chemistry) - Abstract
The symmetrical microstrip angular log-periodic meander-line (ALPML) slow-wave structure (SWS), which is suitable for Ka-band low-voltage traveling-wave tubes, is described in this paper. The dispersion characteristics and coupling impendence of this kind of SWS are achieved by simulation. A radial uniform magnetic field of 0.4 T is developed using radially magnetized permanent magnets to focus the radial sheet electron beam. To exploit the potentialities of the symmetrical ALPML SWS, the beam–wave interaction is carried out with a radial convergent and a divergent sheet electron beam. For the radial divergent electron beam with a voltage of 791 V and a current of 0.3 A, an output power over 60 W with an electron efficiency of 26% at 30 GHz is achieved from particle-in-cell simulation. The effects of misalignments and phase mismatches are carried out at the end. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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