FLEXIBLE EXTENDED HYDROACOUSTIC RECEPTION ANTENNA Russian patent published in 2016 - IPC G01S7/52 

FIELD: navigation system.

SUBSTANCE: antenna comprises an outer flexible cable sheathing, the reinforcing strength member, the set of receivers, each of which consists of two identical sensing elements, sealed enclosure containing electronic circuits with differential amplifiers and ADCs harness digital communication lines and power supply lines, wherein the sensing elements are located In a separate housing lids, which also contains sealed contacts, the housing with the sensor elements are provided with fixed axle flexible cylindrical tube within which is omitted harness digital communication lines and power supply lines, the sensors are designed as piezoelectric coaxial cables with opposite polarity, electrostatic screen as a mesh braid over an electrostatic shield on the housing cover installed centering sleeve of elastic material with longitudinal external protrusions, and the space within the flexible tube and between the flexible tube, the piezoelectric coaxial cables electrostatic screen and the reinforcing strength member is filled with a viscous sound-absorbing elastic medium.

EFFECT: hydrodynamic noise reduction and expansion of the frequency band of the antenna in the low frequencies.

1 cl, 3 dwg