HYDROACOUSTIC ANTENNA Russian patent published in 2006 - IPC G01S7/52 H04R17/00 

FIELD: hydro-acoustics.

SUBSTANCE: antenna contains rod electro-acoustic transformers, held on common receiving-emitting piece, and also is provided with additional metallic plate, adhesively fastened to receiving-emitting piece across its whole external surface by means of intermediate layer of polymer material, while thickness of metallic plate is 0,01-0,02 of wave length at central working frequency, and thickness of intermediate layer is connected to thickness of metallic plate by following ratio: where i=0,1,2 - indexes, related respectively to substance, metallic plate and intermediate layer, - wave number; λ_i - wave length at central working frequency; l_i - thickness of layer; ρ_i - density of layer material; C_i - speed of sound in material of layer.

EFFECT: decreased level of side leaves in wide range of frequencies.

3 dwg