Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2006-03-14
2008-08-05
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S398000, C342S375000
Reexamination Certificate
active
07408507
ABSTRACT:
A phased array antenna system includes an RF front end, a radome, and an optical calibrator embedded in the radome for enabling in-situ calibration of the RF front end. The optical calibrator employs an optical timing signal generator (OTSG), a Variable Optical Amplitude and Delay Generator array (VOADGA) for receiving the modulated optical output signal and generating a plurality of VOADGA timing signals, and an optical timing signal distributor (OTSD). The in-situ optical calibrator allows for reduced calibration time and makes it feasible to perform calibration whenever necessary.
REFERENCES:
patent: 4451830 (1984-05-01), Lucas et al.
patent: 5225839 (1993-07-01), Okurowski et al.
patent: 5274381 (1993-12-01), Riza
patent: 5373302 (1994-12-01), Wu
patent: 5559519 (1996-09-01), Fenner
patent: 5977930 (1999-11-01), Fischer et al.
patent: 5991036 (1999-11-01), Frankel
patent: 6208287 (2001-03-01), Sikina et al.
patent: 6531989 (2003-03-01), Barker et al.
patent: 6788273 (2004-09-01), Schultz et al.
patent: 6836357 (2004-12-01), Wang et al.
patent: 7023390 (2006-04-01), Kim et al.
patent: 7204425 (2007-04-01), Mosher et al.
Ron Sorace, “Phased Array Calibration”, IEEE Transactions on Antennas and Propagation, vol. 49, No. 4, pp. 517-525 (Apr. 2001).
Herbert M. Aumann and Francis G. Willwerth, “Phased Array Calibrations Using Measured Element Patterns”, MIT Lincoln Laboratory, pp. 918-921 (1995).
Ashok Agrawal and Allan Jablon, “A Calibration Technique For Active Phased Array Antennas”, Johns Hopkins University APL, pp. 223-228 (2003).
G. A. Hanpson and a> B. Smolders, “A Fast and Accurate Scheme for Calibration of Active Phased-Array Antennas”, pp. 1040-1043 (1999).
Lutz Kuehnke, “Phased Array Calibration Procedures Based on Measured Element Patterns”, 11th International Conference on Antennas and Propagation, Apr. 17-20, 2001, Conference Publication No. 480, pp. 660-663 (2001).
Paul K. Hughes and Joon Y. Choe, “Advanced Multifunction RF System (AMRFS)”,GOMAC Digest, pp. 194-197 (2000).
S. Tang, R. Chen, B. Li, and J. Foshee, “Waveguides take to the Sky”,IEEE Circuits and Devices, pp. 10-16, Jan. 2000.
Choe Joon Y
Paek Eung Gi
Parent Mark
Karasek John J.
Legg L. George
Liu Harry
Tarcza Thomas H.
The United States of America as represented by the Secretary of
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