Determination of scattering centers for the identification of conducting bodies at microwave frequencies

Information on the shape of perfectly conducting bodies can be obtained from the backscattered field measured as a function of frequency. A FM-CW-Radar with high resolution is used to locate the scattering centers of the bodies. In order to get maximum resolution even for a not perfectly linear frequency modulation, the FM-CW-Radar is used in a measuring set-up with two paths of propagation. The contour of the scatterer can be obtained from the distribution of the scattering centers measured at different aspect angles. A sailplane model is used as an example for a more complicated scatterer to show that a relatively simple evaluation method allows good reconstruction.