| 摘要 |
PROBLEM TO BE SOLVED: To provide an aircraft-mounted antenna device capable of receiving a GPS signal, even in any flying attitude including an attitude of launcher loading, while ensuring not only the directional gain around a machine axis of an aircraft body, but also the directional gains in front and behind the aircraft body. SOLUTION: An antenna device 10 to be mounted on an aircraft 1 rotating at a high speed about a machine axis P comprises: an L-shaped folded antenna 11 formed, by folding a lead wire and including two long parallel wires 12 and two short parallel wires 13 orthogonal with these two long parallel wires 12; and a ground plate 14. The two long parallel wires 12 of the L-shaped folded antenna 11 are connected to a power feeding unit 4 of the aircraft 1, in a state of fixing the two short parallel wires 13 on a top end face 2a of a body 2 of the aircraft 1 along with the machine axis P of the aircraft 1; and the ground plate 14 is fixed along with the machine axis P of the aircraft 1 in an orthogonal contact with the two short parallel wires 13 of the L-shaped folded antenna 11. COPYRIGHT: (C)2006,JPO&NCIPI
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