| 摘要 |
PROBLEM TO BE SOLVED: To provide a helical antenna, which promotes lightening and can be comparatively easily produced. SOLUTION: Concerning this helical antenna, since a conductive band 14 is formed by applying an adhesive agent to the rear side of a tape composed of conductive metal foil and a coil element part 11 is constituted and electrically connected by sticking this band to a body 10 of antenna, molded from resins and the outer peripheral surface of an attaching part 12, even when the body of antenna is vibrated, no adverse effects are exerted upon communication sensitivity. Furthermore, since man-hours required for molding the body of antenna are reduced and the production cost is reduced, the helical antenna is practicable. Moreover, since the metal foil is just stuck to the surface of the body of antenna, the production is simple and an accurate helical interval optimal for presenting satisfactory functions as an antenna can be set.
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