Active MMW Imaging System using the Frequency-Encoding Technique

Millimeter wave imaging has important applications in detecting objects concealed by optically opaque media. In this paper, a prototype active millimeter wave imaging system that uses the frequency-encoding technique is outlined. The performance of the system when imaging a human mannequin at short range is demonstrated experimentally. Further results show the effect on the image when various opaque obstacles are positioned between the imager and the mannequin.