Scattering and Image Simulation for Reconstruction of 3D PEC Objects Concealed in a Closed Dielectric Box

A new approach of imaging reconstruction of concealed targets from multi-angular scattering is presented.As the broadband stepped-frequency radar transmits planar wave from different azimuth directions around the target,the backscattered electrical fields in both the amplitude and phase are obtained.The two-dimensional（2D） fast Fourier transform（FFT） algorithm for spline interpolation is adopted for uniformly sampled backscattering fields.Then,2D images of a dielectric box with and without the concealed targets can be numerically simulated.Multi-azimuth backscattering electrical fields of complex shaped PEC targets and dielectric surrounding are calculated by the method of moments（MoM） which bases on the coupled volume-surface integral equation（VSIE）.The concealed targets can be well identified from the imaging reconstruction