METHOD OF ACTIVE DIRECTION FINDING OF TARGETS Russian patent published in 2018 - IPC G01S3/46 

FIELD: radio engineering, communication.

SUBSTANCE: direction finding method consists in sequentially probing adjacent angular directions in a given sector with a step of varying the angle providing the required angular resolution of the targets and constructing a direction-finding characteristic on the basis of which a decision is made about the presence or absence of targets. According to the invention, the sector of the direction-finding characteristic is subsequently probed at different frequencies, the range of variation of which is chosen such that, due to the existing difference in range to the targets, it is possible to ensure a change in the phase difference of the coherent signals reflected from them at the largest and smallest sounding frequencies by an amount of multiples of 2π, and the step of changing the frequency is selected so as to provide a form of direction-finding characteristic with detail, allowing to decide on the number of targets.

EFFECT: increasing the angular resolution of the direction finder.

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