RADAR METHOD FOR DETECTING UNMANNED AERIAL VEHICLES Russian patent published in 2023 - IPC G01S7/41 G01S13/88 

FIELD: radar detection.

SUBSTANCE: methods for radar detection of airborne objects (AO) and, in particular, to methods for detecting unmanned aerial vehicles (UAV) with low radar visibility. In the claimed method, in addition to an active ground-based radar location station (RLS), several detection UAVs (DUAVs) are additionally used, placing them in adjacent narrow azimuth detection sectors. The elevation position of the direction pattern lobes for different UAVs is chosen differently and direction finding at attacking angles is supplemented by lateral direction finding by neighboring DUAVs from angles close toπ/2. At the same time, a wider azimuth sector (WAS) of UAV detection is made up of several adjacent narrow azimuth sectors (NAS). The wide azimuth sector at the same time covers all directions of possible unauthorized UAV approach. To do this, one DUAV is placed in each UAV detection. In WAS, the angular velocity of rotation of the antenna of the active detection radar is reduced and the pulse repetition frequency of this RLS is increased. When the main lobe passes through the active radar pattern of the s-th UAV, it detects UAVs using the s-th DUAV. At the same time, all other (S-1) DUAVs are also used to detect UAVs in the s-th UAV from the lateral directions during the period when the lobe of the active radar detects the s-th UAV. The elevation positions of the direction pattern lobes for each of the indicated (S-1) DUAVs are different and partially overlap each other in elevation.

EFFECT: creation of a UAV detection method that provides higher detection characteristics in the absence of reliable information about the approach direction and flight altitude of the detected unmanned aerial vehicles.

1 cl, 4 dwg