Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2007-03-17
2008-11-18
Phan, Dao L (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S196000, C342S420000
Reexamination Certificate
active
07453398
ABSTRACT:
The invention refers to array antennas consisting of a set of individual sources set out over the surface of the antenna and whose mechanical positioning is determined in such a way as to obtain the desired radiation pattern. The process according to the invention is designed to compensate for the positioning errors of radiating elements occurring when such an antenna is constructed. These positioning errors follow a law that is in theory random and whose result is known by determining the imperfection vector I whose components of real positioning errors measured for each feed of the antenna obtained comprising components forming values of an error function δ(n) where n represents the index attributed to the radiating element in question. The process according to the invention consists in first measuring the positioning errors. It then consists in determining the spatial spectral components making up error function δ(n). It finally consists in applying to each component an amplitude or phase modulation correction in order to compensate for the degradation of the error function δ(n) on the obtained antenna radiation pattern F(θ). The process according to the invention applies more particularly to antennas comprising radiating beams.
REFERENCES:
patent: 5412390 (1995-05-01), Peavey et al.
patent: 7307595 (2007-12-01), Schantz et al.
patent: 2007/0152871 (2007-07-01), Puglia
patent: 93/11581 (1993-06-01), None
Zaghloul Amir I et al.; “On The Removal Of Blindness In Phased Antenna By Element Positioning Errors”; IEEE Transactions on Antennas and Propagation, IEEE Service Center, Piscataway, NJ, US, vol. AP-20, 1972, pp. 637-641, XP008072326; ISSN: 0018-926X.
Zaghloul A I et al.; “Generalized Cross-Correlation Analysis Of Phased Array Admittance”; Radio Science, American Geophysical Union, Washington, DC,, US, vol. 11, No. 1, janvier 1976 (Jan. 1976), pp. 61-70, XP008072327, ISSN: 0048-6604.
Chekroun Claude
Lienhart Marc-Yves
Rouzeaud Benjamin
Lowe Hauptman & Ham & Berner, LLP
Phan Dao L
Thales
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