Silva, Joana S.Lima, Eduardo B.Costa, Jorge R.Fernades, Carlos A.Mosig, Juan Ramon2015-07-022015-07-022015-07-02201510.1109/LAWP.2015.2409316https://infoscience.epfl.ch/handle/20.500.14299/115537WOS:000356895900005A simple low-cost mobile ground terminal antenna for Ka-band satellite communications is presented. The antenna is composed of a shaped dielectric lens which tilts and rotates in front of a feed to direct the beam. The wideband feed system is composed of a quad-ridged horn with a 45° slant aperture and a coaxial-to-quad-ridged circular waveguide transition. The lens allows simple mechanical beam steering from 0° to 65° in relation to the zenith and 360° in azimuth by rotating both the lens and the feed slanted aperture. Performance measurements of a manufactured prototype prove the beam tilting capabilities in elevation with a maximum gain of 22 dBi and scan loss below 3 dB at 20 GHz and 24 dBi gain with less than 4.5 dB scan loss at 30 GHz.Ka-bandlow-costmechanical beam-steeringsatellite communicationsshaped dielectric lenswideband feedtext::journal::journal article::research article