Transmitting and receiving multipath sonar antenna utilizing a single acoustic lens
AssigneeEtat Francais represente par le Delegue Ministeriel pour l'Armement
InventorsPierre Maguer, Jean Verveur
Life of this patent
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Abstract
A simultaneously transmitting and receiving multipath sonar antenna comprs an acoustic lens which focuses received acoustic beams on a focal surface, and at least two intercalated groups of piezoelectric transducers disposed on the focal surface of the lens. The transducers of the at least two groups are tuned to different frequencies, and the transducers of each group are excited with a phase difference between one column and the next column of the same group.
Claims5
A multipath, emitting and receiving sonar antenna comprising, in combination, an acoustic lens comprising a cylindrical enclosure filled with a fluid which focuses received acoustic beams on a focal surface, and at least two intercalated groups of columns of piezoelectric transducers placed on said focal surface, wherein the transducers of each of said at least two groups are tuned to a different frequency with respect to the other said group, and the transducers of a common group are excited on the same frequency, with the transducers of one column differing in phase with respect to the next column of the same group.
Dependencies are inferred from the claim text.