Wideband meachanical scanning lens antenna at Ku-band

A wideband mechanical beam steering lens antenna was proposed in this paper. Referring to the operating principle of Risley beam steering system, a fixed beam array antenna was utilized to excite the dielectric wedge lens at Ku-band. By controlling the relative rotation between the feed and the lens, the whole antenna system can scan to ±50° in all directions. The whole profile was integrated to minimum by reducing the feeding distance and the attendant strong coupling effect was suppressed exploiting the multiple layers matching technique. The prototype confirms the feasibility of using array antenna to excite the lens for achieving a low profile, wideband, wide mechanical scanning and high aperture efficiency beam steering antenna.