Multi-polarized millimeter-wave imaging for concealed weapon detection

Millimeter-wave (MMW) imaging techniques have been used for the detection of concealed weapons and contraband carried on personnel at airports and other secure locations. In this paper, the multi-polarized MMW imaging technique is researched, which can provide more target information. A test system is built with vector network analyzer (VNA) to verify the feasibility of this imaging technique for concealed weapon detection. The wavenumber domain algorithm is used to reconstruct the MMW images. Experiment results are provided to demonstrate the effectiveness of the multi-polarized MMW imaging.