Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1996-08-07
1998-11-24
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
342 75, 342424, H01Q 300
Patent
active
058413979
ABSTRACT:
An autotracking antenna system operable to cause a steerable antenna assembly to automatically track a moving RF video signal source has a reflector, a rotator for positioning the reflector at any desired position in azimuth and elevation, a primary antenna element positioned to receive an RF video signal reflected from the center of the reflector, and a series of offset antenna elements each positioned to receive an RF video signal reflected from a different off-center location on the reflector. A tracking control processor is operable to select and receive video signals from the primary antenna element and the offset antenna elements and to control the rotator, and a signal receiver receives video signals from the antenna element and has a video signal output. The tracking control processor operates to periodically obtain consecutive samples of the signals from the primary antenna element and the offset antenna element during a predetermined off-screen line of video frames of the RF video signal, and to control the rotator to position the reflector such that the signals received by the offset antenna elements are of substantially equal strength, whereby the primary antenna element receives a signal of maximum possible strength from the RF video source.
REFERENCES:
patent: 4758840 (1988-07-01), Dardenne et al.
patent: 4945410 (1990-07-01), Walling
patent: 5077561 (1991-12-01), Gorton et al.
patent: 5463403 (1995-10-01), Walker et al.
patent: 5592176 (1997-01-01), Vickers et al.
Phan Dao L.
Tarcza Thomas H.
Wescam Inc.
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