Multi-sensor millimeter-wave system for hidden objects detection by non-collaborative screening
2011
In this work, we present the development of a multi-sensor system for the detection of objects concealed under clothes
using passive and active millimeter-wave (mmW) technologies. This study concerns both the optimization of a
commercial passive mmW imager at 94 GHz using a phase mask and the development of an active mmW detector at 77
GHz based on synthetic aperture radar (SAR).
A first wide-field inspection is done by the passive imager while the person is walking. If a suspicious area is detected,
the active imager is switched-on and focused on this area in order to obtain more accurate data (shape of the object,
nature of the material ...).
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