ACTIVE SONAR Russian patent published in 2015 - IPC G01S15/00 

FIELD: radio engineering, communication.

SUBSTANCE: according to the invention, the active sonar includes a processor unit, a receiving-transmitting unit, a connection cable from the processor unit to the receiving-transmitting unit, an antenna unit of the sonar with a built-in signal and control cable, wherein the receiving-transmitting unit is portable and includes two phased antenna arrays operating in a pair, one of which is a radiating array with a fan-shaped directional pattern, installed inside a housing and capable of rotating in the horizontal plane about an axis which passes through its geometric centre, and the other is a receiving antenna array which is immovably fixed in the housing and is made in the form of a ring which encircles the sealed housing, filled with a liquid for compensating for hydrostatic pressure of the ambient medium.

EFFECT: simple design of the sonar and operation thereof, low cost thereof owing to use of industrially manufactured components and existing data processing algorithms.

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