Compact size substrate integrated waveguide phase shifter

The design and implementation of the proposed compact size substrate integrated waveguide (SIW) phase shifter for the K band is presented. The comparison of the simple moved via towards the center of SIW and the structure with three vias moved towards the center with the smooth transition is presented. Results show that return loss values are better and working bandwidth is preserved for greater phase shift obtained. The phase shifter offers 51.4° in the K band.