A steerable Yagi-Uda array antenna using a substrate integrated waveguide Rotman lens

This paper presents a novel steerable 8-12 GHz Yagi-Uda array antenna using substrate integrated waveguide (SIW). It employs an integrated waveguide structure microwave Lens as a beam forming network (BFN). The proposed microwave lens is Rotman type integrated lens in substrate. A prototype lens is designed with 7 beam ports, 9 array ports, and 8 dummy ports. A 10 GHz SIW-fed Yagi-Uda antenna is proposed with nonplanar director element as radiating elements. Throughout this paper, the design process of the proposed steerable phase array antenna for 8-12 GHz sensing application has been demonstrated in details.