Planar antenna for terminal operating with dual circular polarisation, airborne terminal and satellite telecommunication system comprising at least one such antenna

摘要

The antenna has a panel comprising a network of distribution wave guides coupled with radiating wave guides (26) that include radiating elements (27) with double-circular polarization direction. A microwave switch (30) includes microwave outputs (34, 35) respectively connected to upper and lower input/output ports of the radiating wave guide through an upper part (50) and a lower part (51) of the distribution wave guide. A control input (33) controls position (1, 2) of the switch and switches a microwave input (31) of the switch on the output according to circular polarization direction.