The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1998
Filed:
Feb. 10, 1997
Shinichi Nomoto, Tokyo, JP;
Hideo Kobayashi, Saitama, JP;
Teruhiko Honda, Tokyo, JP;
Kazuo Hara, Tokyo, JP;
Kokusai Denshin Denwa Kabushiki Kaisha, Tokyo, JP;
Abstract
It is the object of the present invention to provide a fixed earth station in which many antennas can be placed in a site area limited to one-several tenth of the conventional one. On a rotatable base 2, a plurality of antennas 1a to 1e are mounted. A control unit 4 controls the rotation angle of a drive unit for driving the base by the previously known orbital parameters of communication satellites. Further, the azimuth angle and the elevation angle of the respective antennas are controlled by antenna control units 5a to 5e, and the antennas catch and track communication satellites having appeared in the sky. As a result, the rotation angle of the base 2 can be set so that a beam accessing a satellite of a low elevation angle is not intercepted by other antennas. In addition, the area in which the antennas are placed can be reduced to about 1/50 of the conventional one. As other embodiments, there are an embodiment in which the antenna height is varied, an embodiment in which antennas are mounted on vehicles to change the position thereof, an embodiment in which antennas are made to travel on previously laid rails, etc.