The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2010
Filed:
Apr. 26, 2007
Yves Doisy, Grasse Plascassier, FR;
Louis Raillon, Cagnes sur Mer, FR;
Yves Doisy, Grasse Plascassier, FR;
Louis Raillon, Cagnes sur Mer, FR;
Thales, Neuilly sur Seine, FR;
Abstract
A method for achieving omnidirectional transmission using of a towed linear antenna of length L greater than the wavelength λ of the signal transmitted. The antenna has a plurality of P projectors. The spacing between projectors is substantially less than λ/2. The method includes applying, to each projector, a transmit signal coming from a common transmit signal. The common signal is assigned a delay based upon a calculation that includes a non-linear term as a function of the position of the projector in the antenna, thereby allowing the angular aperture of the transmission pattern to be modulated. the method permits sonar detection systems comprising transmit and receive antennas having substantially identical diameters, which thereby can be reeled onto the same winch without it being necessary to separate them.