Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1997-07-03
1998-08-04
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342372, 342373, H04B 7185
Patent
active
057900710
ABSTRACT:
A Tripulse method determines the orientation or attitude of a phased-array antenna located at a remote site, such as an aircraft or spacecraft. Three pulses are transmitted from the phased-array antenna in an estimated direction toward a coherent receiver, with a sum beam, and with first and second difference beams formed by reversal of the phase of certain elements above a first axis of symmetry, and to one side of a second axis of symmetry. The received signals are processed in a manner which determines the error between the assumed direction and the actual direction of the receiver. To determine the rotational position of the array antenna, the same steps are performed for a second remote receiver, and additional processing determines the complete attitude, including yaw, of the phased-array antenna. The coherent receiver may use the first transmitted pulse as a reference, or it may use a separate reference signal.
REFERENCES:
patent: 5355138 (1994-10-01), Cances et al.
patent: 5400036 (1995-03-01), Kochiyama et al.
patent: 5697050 (1997-12-01), Wiedeman
Ashe Jeffrey Michael
Jacomb-Hood Anthony Wykeham
Kautz Gregory Michael
Silverstein Seth David
Wheeler Frederick Wilson
Blum Theodore M.
Lockheed Martin Corp.
Meise W. H.
Wegemer L. B.
Young S. A.
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