Sector antenna apparatus and vehicle-mounted transmission...

Details Sector antenna apparatus and vehicle-mounted transmission... Sector antenna apparatus and vehicle-mounted transmission...

2005-08-23

2005-08-23

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

With vehicle

C343S776000, C343S876000

Reexamination Certificate

active

06933900

ABSTRACT:
A sector antenna apparatus mounted on a vehicle has a casing, in which six horn antennas having apertures over an angular range of 180 degrees and extending radially are accommodated. The proximal ends of the horn antennas are connected to an antenna changeover switch. A portion of the horn antennas which emits beam radiation in the forward and backward direction and diagonal direction of the vehicle have large apertures, and a portion of the horn antennas which emits beam radiation to the right and left of the vehicle have a small aperture. Thus, the required antenna characteristics, such as angular resolution, beam width, antenna gain, are achievable in the required direction.

REFERENCES:
patent: 5111210 (1992-05-01), Morse
patent: 5113197 (1992-05-01), Luh
patent: 5818393 (1998-10-01), Fowler et al.
patent: 2002/0044082 (2002-04-01), Woodington et al.
patent: 2004/0108963 (2004-06-01), Clymer et al.
patent: 943710 (1956-06-01), None
patent: 0 877 443 (1998-11-01), None
patent: 1 003 241 (2000-05-01), None
patent: 1 251 586 (2002-10-01), None
patent: WO 01/65639 (2001-09-01), None
Copy of European Search Report dated Feb. 16, 2004.
English abstract of JP 10027299.

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