Communications: radio wave antennas – Antennas – With support for antenna – reflector or director
Patent
1998-06-03
2000-08-08
Wong, Don
Communications: radio wave antennas
Antennas
With support for antenna, reflector or director
343766, 343912, H01Q 302
Patent
active
061008567
ABSTRACT:
A device for angular adjustment of a direction-indicating object of an antenna device such that the direction-indicating object performs a mechanical movement without rotating. The inside of a first end of a rigid tube is rotatably arranged via two bearing devices in relation to a fixed part of the antenna device around an axis of rotation, the fixed part is attached to a foundation. An antenna part of the antenna device includes the direction-indicating object. The antenna part is rotatably arranged via a bearing device on a bevelled outer edge of a second end of the tube around a central axis. The outer edge is bevelled to an intended fixed angle which determines the fixed angular adjustment of the antenna part with respect to the fixed part of the antenna device. A cardan coupling is arranged between the fixed part and the antenna part such that the cardan coupling prevents the antenna part from being able to rotate in relation to the fixed part. The antenna part will perform a nutation movement along the outer edge of the tube when the tube is brought into rotation around the fixed part of the antenna device.
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patent: 5633647 (1997-05-01), Tines
Chen Shih-Chao
Telefonaktiebolaget LM Ericsson
Wong Don
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