Vertically polarised omnidirectional antenna
    2.
    发明授权
    Vertically polarised omnidirectional antenna 失效
    垂直极化全向天线

    公开(公告)号:US3949405A

    公开(公告)日:1976-04-06

    申请号:US533709

    申请日:1974-12-17

    IPC分类号: H01Q21/00 H01Q13/12

    CPC分类号: H01Q21/0062

    摘要: A waveguide having a cross-section of oblong shape is pierced with two arrays of longitudinal slots located opposite one another, symmetrically in relation to the longitudinal plane of symmetry of the guide intersecting the cross-section thereof along its smaller dimension. In order to obtain the desired omnidirectional pattern, which requires that the distance between oppositely located slots should not be too great, a waveguide is used the greater dimension of the cross-section of which is reduced relatively to the value required by the operation frequency, and ridges or dielectric material are provided inside the guide for increasing its cut-off frequency.

    摘要翻译: 具有椭圆形横截面的波导被两个相互相对的纵向槽阵列穿过,该纵向槽相对于沿其较小尺寸与其横截面交叉的纵向对称平面对称。 为了获得期望的全向图案,其要求相对定位的狭缝之间的距离不应该太大,所以使用波导的横截面的较大尺寸相对于操作频率所要求的值减小, 并且在引导件内部设置脊或介电材料以增加其截止频率。