METHOD FOR INCREASING THE EFFICIENCY OF A PARAMETRIC ACOUSTIC RADIATING ANTENNA AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC H01Q3/42 

FIELD: hydroacoustics.

SUBSTANCE: invention relates to the field of hydroacoustics, namely to methods and devices for active detection. A method for increasing the efficiency of a parametric acoustic radiating antenna is based on the placement of an electroacoustic transducer with a piezoelectric element with a given resonant frequency /2 = and a bandwidth corresponding to the range of the difference frequency wave in the locating medium, the supply of an electroacoustic transducer to the piezoelectric element from the output of the radiating path of electrical signals, the formation of a spatial region of collinear propagation and nonlinear interaction of intense ultrasonic pumping waves, generation of a difference frequency wave with a cyclic frequency . What is new is that a multicomponent excitation signal is formed by generating vibrations of the same amplitude and with the same initial phase in the emitting path at a time (, with frequencies consistently different from each other at and located in the piezoelectric element bandwidth, and an electric multicomponent excitation signal is fed from the output of the emitting path to the piezoelectric element with a resonant cyclic frequency , representing the sum of fluctuations, and the adjustment of the generation efficiency and the correction of the parameters of the field of a component wave of a difference frequency with cyclic frequencies formed by a parametric radiating antenna is carried out by switching off or antiphase switching of a given set of components. The method is implemented using a device including a reference generator, a delayed pulse generator, matching circuits, frequency dividers, an analog key, an adder, an amplitude modulator, a pulse generator, a power amplifier, an electroacoustic converter, a control and adjustment unit.

EFFECT: increased efficiency by providing the possibility of controlling the generation of a difference frequency wave by a parametric radiating antenna and adjusting the parameters of the forming ultrasonic field.

9 cl, 13 dwg