Rear end planar slot antenna of a substrate integrated waveguide cavity fed by grounded coplanar waveguide

A design of simple profile planar slot antenna which is placed at the rear end of the substrate integrated waveguide is been studied in this paper. The substrate Integrated Waveguide (SIW) adopts the mm wave technology and it facilitates the feeding elemen and the antennato be built over the same substrate. The return loss is obtained as -30dB at 10GHz. Also the performance is analysed by varying the height of the substrate, the length and width of the slot. The simulated antenna has good performance when compared to conventional slot antenna along with miniaturisation by the use of SIW technology . The merits of the antenna include simple profile, low weight, easy fabrication and simple integration with planar circuits.