RADAR CROSS-SECTION OF A RECTANGULAR WAVE-GUIDE ARRAY WITH COMPLEX LOAD AND COVERED WITH DIELECTRIC

The Radar Cross Section (RCS) of an open waveguides array, periodic in its two dimensions, is calculated by the moments method. The field is expanded, in the free space, on a set of Floquet modes and in the waveguides on the set of usual guided modes. Waveguides may be filled and covered by different dielectrics. The modeling takes into account the presence of phase shifters. In this paper, the software which gives the power radiated in the free space is validated by experimental results. We use it to evaluate scattering as a function of mismatching before and after the phase shifters. This software may be used for radiation pattern optimization and, at the same time, for RCS evaluation over a large frequency band.