H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 1/27 (2006.01) H01Q 1/12 (2006.01) H01Q 1/32 (2006.01) H01Q 3/26 (2006.01)
Patent
CA 2473479
In pointing a vehicular (7) mounted directional antenna (5) of a satellite signal receiver at a communications satellite transmitting radio signals by means of analyzing the receiving levels of radio signals transmitted by the satellite and received via the directional antenna, tracking being preceded by a pointing and acquisition mode for initial and repeat pointing of the directional antenna at the satellite, activated as soon as the received signal drops below a defined signal level threshold, signal shadowing caused by obstacles (8) in the link between satellite and directional antenna are sensed by means of a sensor system additionally provided on the vehicle and information as to the shadowing zones in the field of view and/or in the motion range of the directional antenna output and the pointing and acquisition mode is disabled for the duration of passing the shadowing zones on the basis of the information obtained by means of the sensor system as to the shadowing zones following the tracking phase or deactivated following a pointing and acquisition mode, despite the received signal dropping below a defined signal level threshold. For use in mobile satellite communications.
Holzbock Matthias
Luecke Oliver
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Deutsches Zentrum Fuer Luft-Und Raumfahrt E.v.
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