| 摘要 |
<p>An antenna structure in which the antenna is in the form of a helical foil (12) which is supported by winding it on a hollow cylindrical braid (10), the foil (12) and the braid cylinder (10) being potted in a resin. An integral mounting flange (16) is provided at one end. The structure is made by providing a cylindrical mandrel (20) with a flange at one end, braiding a sleeve (10) of fiberglass, for example, over the exterior of the mandrel, winding a foil of conductor (12) such as copper foil around the braided mandrel in the form of an antenna, potting the assembly in an appropriate resin, and then removing the mandrel. The mounting flange (16) is preferably built up in thickness and strength by placing a plurality of thin annular, centrally-operated discs (40) over the cylinder and against the flange, prior to potting.</p> |
