Modal solutions in dual-depth longitudinally corrugated waveguides for design of dual-band 20/30 GHz hard horns

In this paper, a novel approach to the creation of a dual-frequency hard horn is proposed. Our approach is based on using a dual-depth longitudinally corrugated waveguide, the cross section of which is shown in this paper. Analysis of the waveguide eigenmodes as well as an example of the potential performance of a corresponding single-mode hard horn in two bands are given