Preliminary simulations of flat and parabolic reflectarray antennas to generate a multi‐spot coverage from a geostationary satellite

Authors:
Open Access
Publisher website
Google Scholar
Abstract
This study presents the design process and preliminary results of a 1.8‐m reflectarray antenna able to generate a complete multi‐spot coverage for transmission from a geostationary satellite operating in Ka‐band (18.2–20.2 GHz). The reflectarray is designed using a newly validated method which makes it possible to generate four spaced beams per feed at different frequencies and polarisations. Two different antenna configurations have been evaluated: first, a 1.8‐m flat reflectarray has been designed to produce a total of 108 spot beams in two frequencies and two polarisations using 27 dual‐polarised feeds; then, the design has been extended to consider a 1.8‐m parabolic reflectarray to overcome the limitations related to the phase distributions in large flat reflectarrays. The proposed concept can allow a reduction in the number of antennas and feed chains on board the satellite since only two reflectarray antennas would be needed to produce a four‐colour multi‐spot coverage in Ka‐band, one for transmit and other for receive.
Funding Information
  • European Regional Development Fund
  • European Space Agency (4000117113/16/NL/AF)

This publication has 21 references indexed in Scilit: