| 摘要 |
A free standing antenna for use in associations with high-stress environments subjecting the antenna to extremes of flexing stress and temperature stress and chemical stress, the antenna having a mounting base portion which can be secured to a base adjacent to the high-stress environment, the base member being formed of glass fibre reinforced resin materials containing fibres extending in a longitudinal direction, along the axis of the base, and further fibres running in a generally annular fashion in planes generally transverse to the axis, and the base member further defining a fastening flange, a plurality of fastening holes formed in the flange, a generally tapering neck portion extending upwardly from the fastening flange, and a generally cylindrical junction head extending upwardly from the neck, the head and the neck being located along a common central axis, and an antenna column secured to the cylindrical head, the column being formed of hollow tubular metal defining outer and inner wall surfaces, and progressively tapering from a larger end to a smaller end, and a cylindrical junction portion at the wide end which makes a snug fit over the generally cylindrical head portion of the base, at least three electrical connections secured to the column portion adjacent the base, at spaced apart points therealong, to which electrical connections may be made by radio equipment, a generally dome shaped cap secured to the smaller end of the column portion, and, a damping weight secured within the interior of the column spaced below the cap. |
