| 摘要 |
A method of joining an elongate tubular antenna element to an elongate tubular antenna boom; the element having a uniform circular cross-section having a wall thickness and outer diameter thereby defining a ratio of outer diameter to wall thickness, the method including the steps of: locating an element through apertures formed in the wall of the boom, such that the element and boom are substantially perpendicular to each other; restraining the element at two locations which are symmetric about the boom, the unsupported length of element between the restrained locations defining a free element length; and applying an axial compression load to the element between the restrained locations, such that the element is deformed in locations to form expanded portions, which interfere with the wall of the boom, such that a portion of the element is retained in the boom between the deformations, thereby fixing the element and boom relative to each other; wherein for the element, a ratio of free element length to outer diameter and the ratio of outer diameter to wall thickness are both predetermined such that the element deforms to form expanded portions. |
