Corrugated substrate integrated waveguide fed broadband Tapered Slot Antenna at Ku band

An interdigital capacitor fed and corrugated substrate integrated waveguide (SIW) fed Tapered Slot Antenna has been investigated in this paper. Interdigital capacitor type matching element has been incorporated in the feed to achieve better isolation. In the later case, interdigital capacitor and zigzag vias has been replaced by corrugated SIW, which exhibits greater bandwidth and lower side lobe level than the former.