SIGW dual level H-plane horn antenna for millimeter waves

The modified configuration of substrate integrated H-plane horn is presented which is very versatile that enables the horn to have a thin thickness of its planar feed line while having a thick radiating aperture at millimeter wave frequencies. This configuration is based on substrate integrated gap waveguide (SIGW) technology in which the propagating printed ridge is separated with the periodic structure. In this design, the level of the separated ridge has the same thickness of the thin microstrip feeding. The upper level is coupled with a transition to the lower level which is integrated with periodic structure.