Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1998-04-07
1999-07-27
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342174, 342373, H01Q 324
Patent
active
059298090
ABSTRACT:
The invention describes a method and system for the calibration of sectionally assembled phased array antennas. When a large, multi-sectioned phased array antenna on board a satellite (10, FIG. 1) is unfolded during deployment, an error in the alignment of a phased array antenna section (25) can cause an error in the pointing angle of the transmit antenna beam (50). A suitable receive antenna (80) receives a signal from the transmit antenna beam (50) which enables a processor unit (95, FIG. 2) to determine the required correction factor. The correction factor is then applied to the beam coefficients which control the beam of the phased array antenna section (25). Subsequent to a first measurment, the correction factor can be updated to minimize the impact of antenna element failures on the resulting antenna pattern.
REFERENCES:
patent: 4283725 (1981-08-01), Chisholm
patent: 5027127 (1991-06-01), Shnitkin
patent: 5036333 (1991-07-01), Chapman et al.
patent: 5499031 (1996-03-01), Bodonyi
patent: 5530449 (1996-06-01), Wachs et al.
patent: 5644316 (1997-07-01), Lewis et al.
Erlick John Richard
Gross Jonathan Henry
Bogacz Frank J.
Motorola Inc.
Nielsen Walter W.
Phan Dao L.
Tarcza Thomas H.
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