Metal working – Method of mechanical manufacture – Electrical device making
Patent
1993-07-02
1995-04-18
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
343895, H01P 1100
Patent
active
054066930
ABSTRACT:
[Object] To provide a method of manufacturing a helical antenna for satellite communications which has no local bent, etc. in the completed helical coil even though the conductor wire used is of an extremely pliable material, so that a high-quality helical antenna for use in satellite communications is obtained.
[Structure] A winding frame 10 in which supporting elements 12 are projected in the form of a cross from the outer circumferential surface of a rod-form base 11 is first obtained. Wedge members 71 through 74, each of which having a configuration of a cylindrical body divided into four sections along its axis, are installed between the supporting elements 12. Then, with the cylindrical surfaces of the wedge members 71 through 74 being used as a winding guide, a conductor wire is wound in helical form through conductor wire installation grooves 13 formed on the edges of the supporting elements 12. Thus, a helical coil 20 is formed. Afterward, the wedge members are removed from the winding frame 10; as a result, an antenna element of a helical antenna suitable for satellite communication is obtained.
REFERENCES:
patent: 3371410 (1968-03-01), Gintovt
patent: 3629937 (1971-12-01), Fredriksson
patent: 4008479 (1977-02-01), Smith
patent: 4894628 (1990-01-01), Dadswell
patent: 5081469 (1992-01-01), Bones
Egashira Yoshimi
Kawasaki Moriyoshi
Arbes Carl J.
Harada Kogyo Kabushiki Kaisha
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