| 摘要 |
<p>Shaped beam antenna, with single or double reflector, gridded or non-gridded, with shaped beams, which can rotate the polarisation, independent of the polarisation of the feed cluster, for use preferably aboard satellites. Field of application: satellite telecommunications and technical field: micro-wave antennas. The antenna basically consists of (Fig. 1): a reflector (1), one or more polarisers (2), (2a), one or more feed clusters (3), (3a). microwave circuits (4), (4a) to set-up the BFN, input port (5), (5a), connections (C) and (C1) which to obtain the antenna configuration desired should be configured as follows: mono- or multimode BFN; rectangular feed elements (6) oriented according to the coverage required; feed elements excited by the fundamental mode plus some higher modes; polarisation rotator with three or more grids; parabolic or slightly shaped reflector. <IMAGE></p> |
