Title :
Lens-based Ka-band antenna system using planar feed
Author :
Silva, Joana S. ; Garcia-Vigueras, M. ; Esquius-Morote, M. ; Costa, Jorge R. ; Fernandes, Carlos A. ; Mosig, Juan R.
Author_Institution :
Lab. d´Electromagn. et d´Acoust., Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland
Abstract :
This paper presents a simple, low-cost and compact mobile ground terminal antenna for Ka-band satellite communications that operates in the downlink band (19.7-20.2 GHz). The antenna is composed of a shaped dielectric lens which tilts in front of a planar feed to direct the beam. The planar feed is a circularly polarized patch antenna placed inside a cavity. The lens allows a mechanical beam steering from 0° to 57° in relation to zenith with a scan loss of 4.5 dB. In order to show the potential of a planar antenna as a feeder for this application, the proposed system is compared with a previous solution composed of the same dielectric lens and a horn antenna as feeder.
Keywords :
antenna feeds; beam steering; electromagnetic wave polarisation; lens antennas; mobile satellite communication; planar antennas; Ka-band satellite communication; circularly polarized patch antenna; downlink band; frequency 19.7 GHz to 20.2 GHz; lens-based Ka-band antenna system; loss 4.5 dB; mechanical beam steering; mobile ground terminal antenna; planar antenna feed; shaped dielectric lens; Antenna feeds; Dielectrics; Downlink; Gain; Lenses; Ka-band; Satellite communications; dielectric lens; mechanical beam-steering; planar feed;
Conference_Titel :
Antennas and Propagation (EuCAP), 2015 9th European Conference on
Conference_Location :
Lisbon
