Methods and entities for alerting about failure of an unmanned aerial vehicle

    公开(公告)号:AU2016432433A1

    公开(公告)日:2019-07-04

    申请号:AU2016432433

    申请日:2016-12-14

    Abstract: A method (20) performed in a network node (4) is provided for alerting about failure of an unmanned aerial vehicle (2). The method (20) comprises receiving (21) a failure report from an unmanned aerial vehicle (2), obtaining (22) an estimated crash point for the unmanned aerial vehicle (2), and sending (23), based on the obtained estimated crash point, warning signals to communication devices (3) residing within a defined area. Methods in an unmanned aerial vehicle and in a network entity, and a network node, unmanned aerial vehicle, network entity, computer programs and computer program products are also provided.

    15.
    发明专利
    未知

    公开(公告)号:AT462207T

    公开(公告)日:2010-04-15

    申请号:AT04809185

    申请日:2004-12-27

    Abstract: The present invention relates to an antenna arrangement comprising a dielectric medium (2) with a first side (3) and a second side (4), with a feeding arrangement (6; 6') on the first side and at least one slot (5; 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73) in a ground plane on the second side, where the feeding arrangement comprises at least a first (13; 13'; 37; 37'), a second (14; 14'; 38; 38'), a third (15; 15'; 41; 41') and a fourth (16; 16', 42; 42') feeding conductor, each intersecting the gap of the slot (5; 62, 63, 64, 65; 66, 67, 68, 69, 70, 71, 72, 73), where each intersection constitute a feeding point (17, 18, 19, 20; 39, 40, 43, 44, 50, 51, 52, 53) for the antenna arrangement (1; 1'; 1''; 1'''). In a first mode of operation, a first constant E-field (26) that is directed across the slot is obtained. In a second mode of operation, a second E-field (28) which is directed across the slot, having a sinusoidal variation is obtained. In a third mode of operation, a third E-field (30) which is directed across the slot, having a sinusoidal variation, is obtained.

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