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Localisation of concealed worn items using a millimeter wave FMCW radar

: Hantscher, S.; Hägelen, M.; Lang, S.; Schlenther, B.; Essen, H.; Tessmann, A.

Institute of Electrical and Electronics Engineers -IEEE-:
Asia-Pacific Microwave Conference, APMC 2011. Proceedings : Melbourne, 5-8 December 2011
New York, NY: IEEE, 2011
ISBN: 978-1-4577-2034-5
ISBN: 978-0-85825-974-4
Asia-Pacific Microwave Conference (APMC) <25, 2011, Melbourne>
Fraunhofer IAF ()
Fraunhofer FHR

In this paper, the setup of a rotating 94 GHz millimeter wave FMCW radar for passenger inspection on airports is presented. The radar frontend comprises 5 receive channels in order to look the person under test from different aspect angles. A special focus is on the calibration of the integrated VCO of the radar module. Its non-linearity has to be compensated precisely. Else, the phase of the intermediate frequency signal gets distorted which degrades the image resolution. Test measurements performing a 360 degree scan show the ability of the scanner to detect and localize dangerous metallic as well as non-metallic objects worn concealed under the cloths.