An Efficient Method for Modelling Millimeter-Wave Scan for Security Screening of Humans

Abstract

An efficient approach for modelling 3D millimeter wave body scan is presented . The body is represented in the stereolithography (STL) format in terms of many triangles. We pre-cast scattering points in each triangle where the number of points was determined by the area of the triangle and the minimum wavelength. The acquired signal on a receiver is then calculated by summing the effect of all scattering points. In addition, the dielectric parameter of human skin, which is frequency dependent, is used to calculate the reflection coefficient. Signals generated from the simulation software were validated by reconstructing the whole-body images by using the fast Fourier transform algorithm. The simulation data were compared with that from HFSS SBR+ and real measurements. The obtained image and post data analysis demonstrated the accuracy of the presented simulation technique was acceptable and can be used for rapid millimeter-wave body-scan modelling.