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    • 7. 发明授权
    • Circularly-polarized-wave flat antenna
    • 圆极化波平面天线
    • US5453755A
    • 1995-09-26
    • US6518
    • 1993-01-21
    • Hisamatsu NakanoMotoshige SekineKazuhiro YokoyamaYukio NakagawaEiichi TanakaShigeru YoshidaMasaaki KasamaItsuo NakayamaTakao Kawahara
    • Hisamatsu NakanoMotoshige SekineKazuhiro YokoyamaYukio NakagawaEiichi TanakaShigeru YoshidaMasaaki KasamaItsuo NakayamaTakao Kawahara
    • H01Q11/08H01Q21/00H01Q21/24
    • H01Q21/0012H01Q11/08H01Q21/24
    • A plurality of insulators are disposed in holes, respectively, defined in a metal plate of a waveguide of a circularly-polarized-wave flat antenna. Each insulator has a through-hole and a protrusion. The through-hole extends from the outside of the metal plate to the inside of the waveguide. The protrusion protrudes outward beyond the metal plate. The protrusion has a groove which is open to the outside. Curl antenna elements each have a shaft portion, an arm portion, and a curl portion. The shaft portion is fitted in the through-hole of the insulator and partly protrudes outward from the metal plate. The arm portion extends from the protruded end of the shaft portion. The curl portion is in a substantially helical shape and connected to the top of the arm portion. When the arm portion is engaged with the groove of the insulator, provided that the position of the groove of the insulator has been set in accordance with a desired orientation of the curl portion of the curl antenna element, the orientation of the curl portion is automatically set to a predetermined direction. Thus, the orientation of the curl portion can be precisely set to the predetermined direction. As a result, the operation for mounting a large number of curl antenna elements on the insulators in different directions according to the positions thereof can be easily performed.
    • 多个绝缘体分别设置在孔中,限定在圆极化波平面天线的波导的金属板中。 每个绝缘体具有通孔和突起。 通孔从金属板的外部延伸到波导的内部。 突出部向外突出超过金属板。 突起具有向外部开口的凹槽。 卷曲天线元件各自具有轴部分,臂部分和卷曲部分。 轴部装配在绝缘体的通孔中,并且部分地从金属板向外突出。 臂部从轴部的突出端延伸。 卷曲部分是大致螺旋形的并且连接到臂部分的顶部。 当臂部与绝缘体的槽接合时,只要绝缘体的槽的位置根据卷曲天线元件的卷曲部分的期望定向被设定,则卷曲部分的取向自动地 设定为预定方向。 因此,可以将卷曲部的取向精确地设定为规定的方向。 结果,可以容易地进行根据其位置在不同方向上在绝缘体上安装大量卷曲天线元件的操作。