On the Use of Passive Reflecting Surfaces and Compressive Sensing Techniques for Detecting Security Threats at Standoff Distances

Figure 2

Top view of the radar configuration. The blue circles on the left represent a thinned array of transmitter/receiver antennas; the orange dots on the right represent the passive reflecting surfaces, which randomly redirect the energy of the radar towards the target; the person under test (target) is represented by the red silhouette on the top, and the two dimensional planes over which the reconstruction is implemented are represented by the green lines.