Design of high performance wideband corrugated horn

We present the results of investigations in order to design wideband horn antennas both with respect to the return loss and the cross polarisation level. The work reported was intended to design a microwave source with less than 40 dB VSWR, less than -50 dB cross polarisation and low sidelobes over 20% bandwidth. Two analysis techniques may be used for the simulation of such antennas: the method of moment (MoM) based on solution of integral equations, and the scattering matrix technique. The results presented have been obtained using the MoM technique by means of 1D integral equations.