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The anechoic chamber at the Gramat Research Centre is unique as far as its dimensions are concerned. To keep the cost of making such a facility anechoic to a minimum without compromising performance levels, SIEPEL implemented a completely original technique consisting in absorbent rings. The play of shadow zones makes it possible to mask the surfaces subject to specular reflections at grazing angles...
Electromagnetic interference measurements (EMI) for EMC qualification of products have to be made in normalized test sites such as an open area test site or a semi-anechoic chamber. Site validation is defined by European and international standards for the frequency range between 30 MHz and 1 GHz. Using Computational ElectroMagnetics (CEM), it is now possible to predict chamber performance. The work...
The publication of RTCA DO 1601 and EN 61000-4-212 modifies the status of the mode stirred reverberation chamber. Once experimental, today they are industrial and recognized. To design a mode stirred chamber, it should take into account several criteria which influence the performances. The dimensions of the reverberation chamber and the size of the mode stirred influence the statistic uniformity...
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