| 摘要 |
PCT No. PCT/FR87/00367 Sec. 371 Date Jun. 1, 1993 Sec. 102(e) Date Jun. 1, 1993 PCT Filed Sep. 25, 1987 PCT Pub. No. WO88/02535 PCT Pub. Date Apr. 7, 1988.Sonars provided with an acoustically transparent antenna. In a sonar comprising deployable arms (2) provided with columns (4) distributed on a cylindrical surface, the invention provides for the doubling of said columns (7) situated at a small distance from the first columns and for the association of signals from hydrophones mounted in the columns so as to obtain for each pair of columns a cardioid characteristic simulating a baffled antenna. The invention makes possible the suppression of the rear lobe of an acoustically transparent antenna.
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