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Experiments on Broadband EMP Radiation with an Axial Mode Helix Antenna |
| SUN Qi-Zhi, FANG Dong-Fan**, LIU Wei, LIU Zheng-Fen, CHI Yuan, DAI Wen-Feng, HAN Wen-Hui
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Institute of Fluid Physics, China Academy of Engineering Physics, P.O. Box 919-108, Mianyang 621900
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| Cite this article: |
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SUN Qi-Zhi, FANG Dong-Fan, LIU Wei et al 2011 Chin. Phys. Lett. 28 090702 |
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Abstract To produce broadband electromagnetic pulse (EMP) radiation, we design and test a sub-ns pulse system which is utilized to drive an axial mode helix antenna. This sub-ns pulse system consists of a 10-stage Marx generator, an intermediate storage capacitor, an impedance transforming line, and can generate a high voltage of 570 kV with a rise time of 1–1.5 ns on a 300-Ω-resistance load. The diameter, pitch and turns of the helix antenna are 29 cm, 19.5 cm and 5, respectively, with a design frequency of 300 MHz. When the charging voltage of the Marx generator is 30 kV, the electric field of radiated EMP measured 3m from the source is 35 kV/m with a central frequency of 250 MHz. The relatively spectral bandwidth is 25%. The radiated EMP results are reproducible and the system will work in repetition mode if the available dc power is utilized.
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| Keywords:
07.57.Hm
84.70.+p
41.20.-q
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Received: 18 January 2011
Published: 30 August 2011
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| PACS: |
07.57.Hm
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(Infrared, submillimeter wave, microwave, and radiowave sources)
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84.70.+p
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(High-current and high-voltage technology: power systems; power transmission lines and cables)
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41.20.-q
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(Applied classical electromagnetism)
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