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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
