Jaschke, ThomasThomasJaschkeRohrdantz, BenjaminBenjaminRohrdantzMitto, Hans K.Hans K.MittoJacob, ArneArneJacob2019-11-262019-11-262017IEEE Antennas and Wireless Propagation Letters (16): 7896599 (2017)http://hdl.handle.net/11420/3892An ultrawideband K-/Ka-band lens antenna for future satellite communication systems is presented. It consists of an extended hemispherical dielectric lens that is fed by a square substrate-integrated waveguide (SIW) and therefore offers a low-cost alternative to horn antennas. The design procedure is explained, and the antenna performance is presented. A sophisticated test fixture is developed to excite the square SIW. The measured S-parameters and far-field patterns validate the concept and exhibit more than 13 GHz bandwidth.en1536-1225201720102013K-/Ka-bandlens antennassubstrate-integrated waveguide (SIW)ultrawidebandJournal Article10.1109/LAWP.2017.2693179Journal Article