Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Antenna control
Patent
1996-04-23
1998-03-31
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Antenna control
342 81, 342367, 342373, G01S 728
Patent
active
057343454
ABSTRACT:
An antenna system 10 for a communications satellite which transmits and receives communications from ground based devices. The system includes an antenna array 16 containing a plurality of feed elements 18 which cooperate to receive or transmit coverage beams arranged in a circular layout at a coverage area in a far-field region proximate the surface of the earth. The feed elements 18 are arranged in a non-circular layout within the antenna array 16. This system further includes a beam forming network 14 for mapping coverage beam signals onto feed signals which drive the antenna array 16. The beam forming network 14 includes a beam forming matrix 28 and a beam connecting network 30. The beam connecting network 30 separates each coverage beam signal into a plurality of component signals weighted to have differing amplitudes from one another. The component signals are delivered to the beam forming matrix 28 which in turn produces corresponding feed signals to drive the antenna array 16 in such a manner as to form feed beams which cooperate to define the coverage beams at the far-field region. The beam connecting network 30 weights the component signals unevenly in order to shift corresponding resultant coverage beams inward or outward until aligned within the coverage area in a circular layout along concentric circles.
REFERENCES:
patent: 3731316 (1973-05-01), Sheleg
patent: 4335388 (1982-06-01), Scott et al.
patent: 4752925 (1988-06-01), Thompson et al.
patent: 4792813 (1988-12-01), Rosen
patent: 4868886 (1989-09-01), Assal et al.
patent: 4901084 (1990-02-01), Huguenin et al.
patent: 4901085 (1990-02-01), Spring et al.
patent: 4907004 (1990-03-01), Zacharatos et al.
patent: 4924234 (1990-05-01), Thompson
patent: 5038150 (1991-08-01), Bains
patent: 5081464 (1992-01-01), Renshaw
patent: 5093668 (1992-03-01), Sreenivas
patent: 5115248 (1992-05-01), Roederer
patent: 5248980 (1993-09-01), Raguenet
patent: 5433726 (1995-07-01), Horstein et al.
patent: 5539415 (1996-07-01), Metzen et al.
patent: 5555257 (1996-09-01), Dent
patent: 5576721 (1996-11-01), Hwang et al.
"Antenna Engineering Handbook", Chapters 34-36 by Richard Johnson, McGraw-Hill, Inc., 1993.
"A Comparison Among 1-, 3-, and 7-Horn Feed for a 37-Beam MBA", IEEE Transactions on Antennas and Propagation, vol. 2., No. 1, pp. 1-8, Jan. 1994.
Chen Chun-Hong Harry
Ho Antony Y.
Melnick Martin
Sotomayor John B.
TRW Inc.
Yatsko Michael S.
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