摘要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.
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.
SUN Qi-Zhi;FANG Dong-Fan**;LIU Wei;LIU Zheng-Fen;CHI Yuan;DAI Wen-Feng;HAN Wen-Hui
. Experiments on Broadband EMP Radiation with an Axial Mode Helix Antenna[J]. 中国物理快报, 2011, 28(9): 90702-090702.
SUN Qi-Zhi, FANG Dong-Fan**, LIU Wei, LIU Zheng-Fen, CHI Yuan, DAI Wen-Feng, HAN Wen-Hui
. Experiments on Broadband EMP Radiation with an Axial Mode Helix Antenna. Chin. Phys. Lett., 2011, 28(9): 90702-090702.
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2011, Vol. 28 
