METHOD FOR CONTROLLING THE SHAPE OF THE MAIN LOBE OF THE PATTERN FUNCTION OF THE EMITTING PARAMETRIC ANTENNA AND THE DEVICE FOR REALIZING Russian patent published in 2019 - IPC H01Q3/42 

FIELD: hydroacoustic equipment.

SUBSTANCE: invention relates to hydroacoustic engineering and can be used in designing hydroacoustic antenna systems. In the known method of controlling the shape of the main lobe of the pattern function of the emitting parametric antenna, the structure of the ultrasonic field emitted by the piezoelectric cell for frequencies f₁ and f₂ by means of electric switching of sections of extended-surface signal electrode with output of radiating path and through active-reactive loads with common continuous surface electrode. Signal electrode of piezoelectric element is surface-extended in form of flat spiral, common electrode of piezoelectric cell is solid, and the device further includes two analogue multichannel keys, the outputs (inputs) of which are electrically connected to different sections of the long-surface signal electrode in the form of a flat spiral, the output of the rejection filter and the input of the active-reactive loads unit, output of unit of active-reactive loads is connected to common solid surface electrode of piezoelectric element, and also control unit, outputs of which are connected to control inputs of both generators, pulse generator, both analogue keys, as well as unit of active-reactive loads.

EFFECT: technical result consists in enabling control of the shape of the main lobe of the PF of the emitting parametric antenna, which enables to adjust the angular resolution of the hydroacoustic equipment in difficult echo-search conditions.

4 cl, 5 dwg