| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna for an unmanned helicopter by which a stable communication state can always be obtained. SOLUTION: A plurality of antennas 18 and 71 are connected with a transmitter 27 which is loaded on the airframe through an antenna changer 74, and the antennas 18 and 71 are switched depending on a communication state. As an example, the antennas are provided in front and behind the skid which is provided on the lower section of the airframe. As another example, the antennas are provided on the right and the left on the external sides of the side surfaces of the airframe. As one more example, the antennas are integrally provided on the supporting legs of the right and left skids which are provided on the lower section of the airframe. COPYRIGHT: (C)2007,JPO&INPIT
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