Circular polarization probe antenna structure

The utility model relates to an antenna design field, especially a circular polarization probe antenna structure. It includes feed portion, metal casing and the medium packing portion that connects gradually, wherein, feed portion is the disc, and these central authorities of disc feed portion are provided with a rectangular waveguide, medium packing portion is including the frustum, cylinder portion and the waveguide step portion that connect gradually, waveguide step portion includes two at least waveguide steps, the top of waveguide step portion is provided with rotatory waveguide component, rotatory waveguide component matches with the rectangular waveguide shape, and inserts among the rectangular waveguide, the metal casing parcel is in the outside of cylinder portion and waveguide step portion. 本实用新型涉及天线设计领域，特别是种圆极化探头天线结构。其包括依次连接的馈电部、金属外壳以及介质填充部，其中，所述馈电部为圆盘形，该圆盘形馈电部中央设置有矩形波导；所述介质填充部包括依次连接的锥台、圆柱部以及波导台阶部；所述波导台阶部包括至少两个波导台阶，所述波导台阶部的顶端设置有旋转波导节，所述旋转波导节与矩形波导形状匹配，并插入在所述矩形波导中；所述金属外壳包裹在圆柱部及波导台阶部的外部。