Electromagnetic Modeling of Conducting Sphere for the Received Signal Simulation of See-Through-the-Wall Radar

See Through the Wall Radar, is a relatively new small range radar that uses electromagnetic waves to detect targets behind the wall. Because of its symmetry, a conducting sphere is often used as a reference scatterer to calibrate radars and measure the scattering properties of other radar targets. In this paper, in order to simulate the received signal for See- Through- the- Wall radar, the scattering model of a conducting sphere in free space is presented. Then using a dielectric sheet to represent the wall between the radar system and the sphere behind it, the scattering model of a sphere behind the wall is developed. To create the image of the conducting sphere behind the concrete wall using the signals acquired with the proposed model, the Range Migration Algorithm (RMA) and the coherent background subtraction are used and, as a result, an image of the sphere behind the wall has been achieved. Simulation results reveal the suitability of the proposed model for See-Through-the-Wall Radar received signal simulation.