28GHz Dual Polarized Beam Steering Antenna with Substrate Integrated Frequency Selective Structure

We propose a new type of mm wave beam steering antennas that permits larger steering angular range and almost no gain dispersion versus steering angle. Indeed, the limited angular range and the gain decrease when the steering angle increases are the main drawbacks of conventional planar phased arrays. The proposed design method starts with a substrate integrated waveguide which has a switchable frequency selective structure. The next design steps consist on a dual polarized conformal arrays, the feeding port structure of a power divider in a radial waveguide, the transitions to the radiating elements, the substrate integrated circular frequency selective structure and finally the full antenna. Based on this design methodology, a dual polarized beam steering antenna operating at 28 GHz is presented.