| 摘要 |
PROBLEM TO BE SOLVED: To provide a configuration for an antenna element fixing section that enables the extremely easy fixing of an antenna element to a boom, merely by applying vertical pressure on the boom after the antenna element has been passed through holes in the walls of a boom pipe, and to provide an antenna production method. SOLUTION: Two ribs being long in the direction of the boom axis are provided in parallel, so as to create vertical gaps on the inner surface of both left and right wall sections of a boom pipe wall. Walls, located to the outer side of the vertical gap between the two ribs, are significantly curved and projected towards the outer periphery, thus the four ribs are moved diagonally, in the direction whereby the vertical gaps between each set of two ribs get smaller and the distance between the ribs on the left and those on the right becomes greater. The four ribs are configured so as to bite into wall sections on both sides of each of the external walls of the antenna element, from each diagonal direction. The antenna element is anchored into the hollow-pipe boom in a state which prevents the turning or movement along the axis line of the antenna element. COPYRIGHT: (C)2011,JPO&INPIT |
