| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device having a plurality of directivity by simple and small structure. SOLUTION: The antenna device 1 has a plurality of antenna elements 2a-2d each comprised of a conductor plate. The plurality of antenna elements 2a-2d is radially arranged. In the plane projection of the plurality of antenna elements 2a-2d, taper slots 8a-8d in which a distance between adjacent edges gradually becomes long outward of the radiating direction from an intersection between the adjacent edges by the intersection of the edges of the adjacent antenna elements and overlapping parts 4a-4d in which the adjacent antenna element surfaces are overlapped are formed. Power feeding parts 3a-3d are formed in the duplicated parts 4a-4d. COPYRIGHT: (C)2008,JPO&INPIT
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