Design of a multi-feed EBG antenna as a focal array for Ka-band space applications

Hassan Chreim (1) , Régis Chantalat (2) , Eric Arnaud (1) , Marc Thevenot (1) , Umair Naeem (1, 3) , Stéphane Bila (3) , Serge Verdeyme (3) , Thierry Monédière (1) , Patrick Dumon , Hubert Diez , Baptiste Palacin (4) , Damien Pacaud (5) , Yann Cailloce (6) , Gérard Caille , Peter de Maagt

1 OSA
2 CISTEME - Centre d'Ingénierie des Systèmes en Télécommunication, en ÉlectroMagnétisme et en Electronique
3 MINACOM
4 CNES - Centre National d'Études Spatiales [Toulouse]
5 TAS - Thales Alenia Space [Toulouse]
6 ASP - ALCATEL SPACE

This paper is dedicated to the design of a multi-feed matched EBG antenna, providing overlapped beams, as a reflector focal array for Ka-band space applications. The architecture must ensure the coverage of Europe through 40 spots "Agora mission proposed by CNES" with a 4x reuse scheme (2 linear polarizations and 2 frequency channels). As a first step, the EBG antenna will be studied in mono-feed configuration. Then, the simulation of the multi-feed EBG antenna will show us its suffering from the mutual coupling between feeds which disturbs the radiation. Once the S-parameters of the multi-feed antenna are extracted, suited filters will be connected to the antenna in order to isolate channels and reconstruct the radiation. Finally, the whole system (EBG antenna illuminating a reflector) will be studied in order to characterize the coverage.

Mots clés: Antenna arrays; Apertures; Feeds; Filters; Frequency; Iris; Metamaterials; Periodic structures; Polarization; Reflector antennas

Domaines: Electronique

Hassan Chreim, Régis Chantalat, Eric Arnaud, Marc Thevenot, Umair Naeem, et al.. Design of a multi-feed EBG antenna as a focal array for Ka-band space applications. The 4th European Conference on Antennas and Propagation EUCAP 2010, European Association on Antennas and Propagation (EurAAP), Apr 2010, Barcelone, Spain. pp.978-84-7653-472-4. ⟨hal-00481678⟩