Extremely high-frequency beam steerable lens-fed antenna for vehicular sensor applications

A low-profile, high-performance beam steerable antenna, also referred to as electrically steerable array or array, system is proposed for vehicular sensor applications. The antenna aperture is realised by a phased array fed with a tri-focal Rotman lens. Theory of designing the beam-forming network and an improved parametric study are presented, while the narrow-H-plane, broad-E-plane microstrip antenna fed by the printed lens is investigated for extremely high-frequency -band operation. The full wave simulation demonstrates good results for the antenna use over the required two-dimensional scanning range of ±45°.