MULTI-BEAM ANTENNA AND FORMATION METHOD FOR MULTI-BEAM ANTENNA

To alleviate degradation of an antenna radiation pattern caused by mutual coupling between adjacent radiation elements.SOLUTION: A multi-beam antenna includes: a disc-shaped dielectric 1; a plurality of radiation elements 2 arranged along a circular outer periphery of the dielectric 1 and independently provided with a power feeding part 2A; an arc-shaped fixture 3 with a certain radius fitting the plurality of radiation elements 2 together; and conductor reflection plates 4, 5 arranged on each of a top face and a bottom face of the dielectric 1. A center a1 of the dielectric 1 and an arc center a2 of the fixture 3 of the radiation element 2 are arranged at different points along the radial direction of the dielectric 1.SELECTED DRAWING: Figure 1 【課題】隣接する放射素子同士の相互結合により生じるアンテナ放射パタ−ンの劣化を緩和する。【解決手段】円板状の誘電体１と、誘電体１の円形外周に沿うように配置されて給電部２Ａが独立して設けられた複数の放射素子２と、複数の放射素子２を一括して取付ける一定半径を有する円弧状の取付具３と、誘電体１の上面及び下面にそれぞれ配置される導体反射板４，５と、を有し、誘電体１の中心ａ１と放射素子２の取付具３の円弧中心ａ２とを誘電体１の半径方向に沿う異なる点に配置する。【選択図】図１