Abstract
In this paper, a high-power ultrawideband antenna is presented for the purpose of remotely neutralizing improvised explosive devices. The developed antenna has a bandwidth between 230 MHz and 2 GHz, as well as a maximum realized gain of 18.7 dB. The antenna structure incorporates a solid dielectric (HDPE 1000) so that it can be powered, without risk of a possible breakdown voltage, by a Marx generator which delivers a bipolar pulse with a peak amplitude of +/−250 kV, a rise time of 170 ps, and a duration of 1 ns. The radiated electric field obtained in simulation is, respectively, 1 MV/m peak and 126 kV/m peak at a distance of 1 m and 10 m.
Highlights
Over the past decades, high-power electromagnetic (HPEM) pulses have been studied for a variety of applications, ranging from tests on biological cells [1] to military purposes such as nonlethal neutralization of moving targets like cars or boats [2, 3]
The primary explosive will set off the secondary explosive, which in turn will trigger the main charge of the improvised explosive devices (IEDs)
Power cables can act like an antenna to allow radiated energy to couple through them. e simulations carried out in [7], with several hundred random arrangements of power cables connected to the IED detonator, highlighted optimal coupling frequencies between 500 MHz and 2 GHz
Summary
High-power electromagnetic (HPEM) pulses have been studied for a variety of applications, ranging from tests on biological cells [1] to military purposes such as nonlethal neutralization of moving targets like cars or boats [2, 3]. Ese M6 detonators were exposed to an electromagnetic field to determine the coupling ratio between the energy absorbed by the IED, via its power cables, and the fluence delivered by an antenna. Is fluence level can be translated directly into a peak radiated electric field of 600 kV/m or 600 V/m, for a respective duration of 1 ns and 1 ms To meet this need, the proposed solution is a nondispersive ultrawideband (UWB) antenna which must be adapted to include the coupling frequencies and which must be powered by a +/−250 kV bipolar pulse delivered by a 13-
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