A Ku band high efficiency coaxial relativistic backwardwave oscillator with low magnetic field

Tan Weibing; Cao Yibing; Song Wei; Chen Changhua; Li Xiaoze; Zhang Ligang; Zhu Xiaoxin

doi:10.11884/HPLPB201628.151098

Volume 28 Issue 09

Aug. 2016

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Article Navigation > High Power Laser and Particle Beams > 2016 > 28(09): 093002

Kan Mingxian, Duan Shuchao, Zhang Zhaohui, et al. Verification and validation of two dimensional magnetically driven simulation code MDSC2[J]. High Power Laser and Particle Beams, 2019, 31: 065001. doi: 10.11884/HPLPB201931.180300

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Tan Weibing, Cao Yibing, Song Wei, et al. A Ku band high efficiency coaxial relativistic backwardwave oscillator with low magnetic field[J]. High Power Laser and Particle Beams, 2016, 28: 093002. doi: 10.11884/HPLPB201628.151098

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A Ku band high efficiency coaxial relativistic backwardwave oscillator with low magnetic field

doi: 10.11884/HPLPB201628.151098

1.
Science and Technology on High Power Microwave Laboratory,Northwest Institute of Nuclear Technology,Xi’an,710024,China

Received Date: 2015-10-30
Rev Recd Date: 2016-02-03
Publish Date: 2016-09-15

Abstract

Abstract

A Ku band coaxial relativistic backward wave oscillator (RBWO) with low magnetic field is presented in this paper. This RBWO works at coaxial TM01-mode which contains two-segment slow wave structures (SWSs). The first segment SWS mainly modulates the intense electron and the second one mainly extracts the microwave energy. By introducing pre-modulate using an asymmetry reflector, the modulation depth is improved. By optimizing the length of the drift between SWSs, the field distribution is optimized and the axial electric field intension of the extract SWS is farther improved. The efficiency of the RBWO is improved. Finally ,when the magnetic field is 0.6 T，the diode voltage is 490 kV，the diode current is 7.5 kA, a 1.27 GW microwave is obtained with an efficiency of 35% and a frequency of 14.7 GHz.
- high power microwave,
- low magnetic field,
- coaxial relativistic backward wave oscillator,
- high efficiency,
- Ku band,
- electron beam pre-modulation

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