Abstract
In this paper, we describe a current generator which consists of the Marx, the current-limited resistors, and the output port and can produce a double-exponential current waveform with the 3 kA, the rise time 10 ns, the pulsewidth 100 ns following the requirement of the IEC 61000-4-25 standard, while the effective impedance of the tested systems does not exceed $2~\Omega $ . A new cavity of Marx is constructed by 12 steel rods which help assembly work more convenient; moreover, the current waveform has less disturbed signal. Because of using the cavity, the charging, trigger, and grounded circuits can be installed out of the Marx. Meanwhile, the cantilever insulated support of Marx also is used. The methods above can help make a compact current generator with a low inductance which can be beneficial to research the electromagnetic coupling laws of system circuit ports and chips.
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