Effect of dielectric window material on propagation characteristics of high-power microwave

Huang Huijun; Hou Qing; Zhu Xiaoxin; Chen Changhua; Zhang Zhiqiang; Fang Jinyong

doi:10.3788/HPLPB20132502.0419

Volume 25 Issue 02

Dec. 2012

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(02): 419-422

Cao Yibing, He Juntao, Zhang Jiande, et al. Excitation system of low-impedance foilless transition-radiation oscillator[J]. High Power Laser and Particle Beams, 2012, 24: 2709-2712. doi: 10.3788/HPLPB20122411.2709

Citation:

Huang Huijun, Hou Qing, Zhu Xiaoxin, et al. Effect of dielectric window material on propagation characteristics of high-power microwave[J]. High Power Laser and Particle Beams, 2013, 25: 419-422. doi: 10.3788/HPLPB20132502.0419

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Effect of dielectric window material on propagation characteristics of high-power microwave

doi: 10.3788/HPLPB20132502.0419

1.
Laboratory for High Power Microwave Science and Technology,Northwest Institute of Nuclear Technology,P.O.Box 69-13,Xi’an 710024,China;
2.
National Key Laboratory of Antennas and Microwave Technology,Xidian University,Xi’an 710071,China

Received Date: 2012-05-15
Rev Recd Date: 2012-08-13
Publish Date: 2013-02-10

Abstract

Abstract

Propagation characteristic of plane waves passing through infinite dielectric boards is studied using optical methods, and the effect of dielectric windows on microwave propagation is analyzed in the paper. The microwave discharge experiments of polytetrafluoroethylene (PTFE) were performed in vacuum under S-band high-power microwave with a frequency of 2.86 GHz. After a long time of surface flashover, tracks and electrical trees appear on the PTFE material surface. In the 100 ns pulse condition, partial discharge on the dielectric surface has been observed by optical photography, and the partial discharge can still cause electrical trees appear on the material surface. As a comparison, an electrical aging experiment of the polystyrene material was conducted. The experimental results show that the polystyrene material has good resistance to tracking and electrical treeing.
- microwave window,
- surface flashover,
- electrical tree,
- high-power microwave

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