Communications: radio wave antennas – Antennas – Antenna with parasitic reflector
Patent
1998-05-07
2000-10-03
Wong, Don
Communications: radio wave antennas
Antennas
Antenna with parasitic reflector
343833, 343824, 343845, H01Q 1900, H01Q 2100
Patent
active
061279870
ABSTRACT:
An antenna comprising the following members are provided: a first board-shaped dielectric material; a cylindrical member, provided on one face of the first board-shaped dielectric material, in which a part of a side wall may be cut off; plural second board-shaped members provided as radiating on the outer surface of the cylindrical member, one end face of each second board-shaped member being in contact with the surface of the first board-shaped dielectric material; and plural sets of plural pole members perpendicular to the surface of the first board-shaped dielectric material, made by forcing out corresponding portions of the first board-shaped dielectric material, the sets radiating from the outer surface of the cylindrical member and the plural pole members in each set being arranged in a line, and each set existing between two positional directions of the adjacent two second board-shaped members. The surface as one face of the first board-shaped dielectric material and the surfaces of each above member are coated with a conductive coating, by which the first board-shaped dielectric material, the cylindrical member, the second board-shaped members, and the pole members respectively function as a ground plane, a reflector, fins, and parasitic elements. A radiator is provided on an extension from each line on which a set of the parasitic elements on the ground plane exists and between the innermost parasitic element and the outer surface of the reflector.
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Kagoshima Kenichi
Maruyama Tamami
Uehara Kazuhiro
Nguyen Hoang
Nippon Telegraph and Telephone Corporation
Wong Don
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