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US 7,177,233 B2Granted
Synthetic sonar antenna
AssigneeThales
InventorDidier Billon
Life of this patent
Estimating the term…
Abstract
The invention relates to a synthetic sonar antenna and more particularly to the self-calibration of such an antenna. It consists in minimizing the number of sensors of the reception antenna by fixing the reduced pitch between the sensors, imposed by the precision of the self-calibration, solely at the two ends of the antenna. According to a variant, the reduced pitch is fixed at just one end of the antenna. It makes it possible to increase the precision of the self-calibration with a smaller number of sensors than in the prior art.
Claims7
An antenna for a sonar with synthetic antenna processing, comprising:
- a plurality of spaced out sensors distributed in a main zone in which the sensors are spaced out by a pitch d and at least in one zone located at one end of the antenna in which the sensors are spaced out by a pitch d′ smaller than pitch d, said pitch d being defined so as to obtain the desired level of the grating lobe in the directivity pattern of a channel and said pitch d′ being defined so as to obtain the desired precision for the self-calibration of the antenna, said self-calibration being made by the means of an inter-recurrences correlation.
Dependencies are inferred from the claim text.