An Imaging Reflector System with Reduced Scanning Aberrations

Author

Sciannella, Christian ; Toso, Giovanni

Author_Institution

ESA-ESTEC, Eur. Space Agency, Noordwijk, Netherlands

Volume

63

Issue

4

fYear

2015

fDate

Apr-15

Firstpage

1342

Lastpage

1350

Abstract

Imaging reflector systems, also known as magnified phased array antennas, combine the advantages of reflectors and arrays in one architecture. They are particularly attractive for satellite applications requiring a high number of beams with some reconfigurability capability. They are able to scan one beam electronically or to generate a multibeam coverage in a limited field of view. The caustics of this antenna system are analyzed adopting a geometrical optics procedure and a semi-deterministic phase compensation procedure is proposed for reducing the scanning aberrations.

Keywords

aberrations; antenna phased arrays; multibeam antennas; reflector antennas; satellite antennas; scanning antennas; antenna system; beam electronical scanning; geometrical optics procedure; imaging reflector system; magnified phased array antenna; multibeam coverage; reconfigurability capability; satellite application; scanning aberrations reduction; semideterministic phase compensation procedure; Arrays; Equations; Feeds; Imaging; Reflection; Reflector antennas; Caustic; Geometrical Optics; caustic; conjugate point; geometrical optics; imaging reflector system; magnified phased array; scanning aberrations;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2403872

Filename

7042819