| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable fixing unit structure of antenna elements that ensures fixing of the antenna elements, by engaging the tops in two strip ribs within a boom to circumferential walls of the corresponding antenna elements. SOLUTION: Two long strip ribs are installed in parallel in an axial direction of the boom while a gap is formed between them in the upper and lower directions of the respective right and left inner surfaces of a wall unit in a tube wall of the boom, and are formed in a chevron shape in the ribs so as to form the tops in the sides closer to the partner rib. Tube wall holes are mutually formed between the two right and left strip ribs, the diameter of each tube wall hole is formed smaller than the gap between the mutual tops of the two right and left strip ribs, top units in the two strip ribs are engaged to the circumferential wall of the respective corresponding antenna elements, and the antenna elements are fixed to the boom so as to prevent the turning of the antenna elements and the axial movement at the top units. COPYRIGHT: (C)2011,JPO&INPIT
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