A NOVEL COMPACT CORRUGATED HORN

The paper describes a novel compact corrugated horn with a wide bandwidth over which both the sidelobe level and crosspolarisation are low. The horn comprises three sections, an initial flare from the horn throat followed by two straight sections whose flare angles are chosen so that the final section leads to a plane aperture. By making an appropriate choice of the change in flare angle and the position of the change, the adverse influence of the higher order HE12 mode can be greatly reduced, when it is excited at a change in flare angle