Design and Modeling of a Linear Array of Longitudinal Slots on Substrate Integrated Waveguide

In SIW structures, side walls are substituted by metal vias and plated holes. In this paper, we present a SIW slot array antenna, which is fed by a corporate type of microstrip power divider. The slot array and the feeding network can be fabricated on a single substrate. As a result, not only the size, weight and cost of the waveguide slot array antennas are reduced, but also the manufacturing repeatability and reliability are enhanced. Meanwhile the gain and efficiency of those antennas have only a little depression because of the dielectric loss.