Effect of E-plane end shape on ripple suppression and focal arc of 300GHz band cylindrical lens

A 4 sectoral horn E-plane phased array fed cylindrical lens was designed for 280GHz 28dBi E-plane fan beam. In simulation, mechanical H-plane scan across ±12° by sliding was satisfactory, but E-plane phased array scan was affected by 2.5dB ripple from standing waves within the lens. Modifying the E-plane ends of the lens by serrating or curving was found to suppress the ripple without affecting H-plane scan, but changed the focal arc.