MULTI-FREQUENCY RECEIVING-EMITTING ANTENNA DEVICE Russian patent published in 2019 - IPC G01S15/02 H01Q5/00 

FIELD: physics.

SUBSTANCE: invention relates to aerial and hydroacoustics and flaw detection, for acoustic logging, etc., providing ultrasonic echo search with high spatial selectivity in a wide frequency band. Multifrequency receiving-emitting antenna device comprises a radiating path with generators of electric harmonic signals with different oscillation frequencies, frequency multipliers, analog keys, power amplifiers, a multielement electroacoustic transducer from half-wave rod piezoelectric elements, which form identical sectors on the radiating surface from oscillating systems with resonance at modes of normal oscillations, multichannel acoustic tube made in the first part with the same transverse-sector honeycomb structure from the longitudinal resonator channels with lengths on which the odd number of wavelengths corresponding to the frequencies of the harmonic signal generators is placed, note here that sector of multielement electroacoustic transducer corresponds to transverse-sector honeycomb structure from longitudinal channels-resonators, acoustic valve-reflector, control unit and pulse generator. Multifrequency transceiving antenna device additionally comprises second and third parts of acoustic pipe with diameter equal to diameter of first part, wherein first and second parts of acoustic pipe have rigid wall, and third part with sound-transparent wall, additional multielement electroacoustic transducer installed in the end of the third part of the acoustic pipe, inside which there is a bipyramidal reflector, made in form of two regular pyramids, the bases of which are aligned, and the vertices are located on the axis of the acoustic pipe, wherein one of the vertices is directed to the acoustic reflector valve, and the other one is directed to the additional multi-element electroacoustic transducer.

EFFECT: proposed device allows to expand frequency spectrum at ultrasonic echo-hunting in preset plane with high spatial selectivity.

8 cl, 4 dwg