HYDRO ACOUSTICAL ANTENNA OF PUMPING Russian patent published in 2007 - IPC G01S7/52 H04R17/00 

FIELD: the invention refers to hydro acoustical technique and may be used in parametric radiated antennas of hydro acoustical Doppler logs and echo-sounding devices.

SUBSTANCE: the technical result is expansion of functional possibilities at the expense of creation possibility of using the antenna in two regimes of forming characteristics of direction: characteristics of direction with one main petal and characteristics of direction with two main petals. The antenna is fulfilled in the shape of multi element discrete antenna array having flat aperture. The antenna has rod piezoelectric elements of two types having resonance frequencies, equal to upper and low frequencies of pumping and a rear screen packaged in a common body pressurized along the working surface at least with one sound transparent layer. The piezoelectric elements are placed in rows. In each row there are elements of one type. The rows with piezoelectric elements are interleaved between themselves. The distance between the centers of the rows with piezoelectric elements of one and same type does not prevail the length of the sound wave in water on the upper frequency of pumping. The piezoelectric elements inside the row are incorporated in interleaved sections of equal extension. The relation of the extension of the sections formed by piezoelectric elements of different types is inversely proportional to their resonance frequencies. The piezoelectric elements forming the section are connected between themselves in parallel. The sections of piezoelectric elements of each type are combined in two groups. The neighboring in the row sections are included in different groups. The sections in the group are connected between themselves in parallel.

EFFECT: expands functional possibilities.

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