HYDROACOUSTIC TRAILING ANTENNA FOR GEOPHYSICAL WORK Russian patent published in 2012 - IPC G01S7/52 G01V1/38 

FIELD: physics.

SUBSTANCE: antenna has piezoelectric receivers consisting of two identical sensitive piezoelectric elements, sealed housings in which there are electronic boards with differential amplifiers, whose inputs are connected antiphase to the sensitive piezoelectric elements and the outputs to analogue-to-digital converters, whose outputs are connected to a digital communication line, a power line and power cable made of elastic fibres; the sensitive elements are made from a piezoelectric film with an electroconductive electrode coating deposited on its surface and attached to it; the housing is in form of thin-walled cylinders made of plastic on whose inner surface there are two identical sensitive film-type piezoelectric elements made from an electrically polarised piezoelectric film. The films are attached to the inner surface of the cylinders by sides with opposite polarity of electric polarisation, and the ends of the cylindrical housings are closed by covers.

EFFECT: smaller antenna diameter with high immunity from electromagnetic interference and high water depth.

1 dwg