METHOD OF DETERMINING COORDINATES OF A RADIO-FREQUENCY SOURCE FROM AN AIRCRAFT BOARD USING A TRI-ORTHOGONAL LOOP ANTENNA SYSTEM Russian patent published in 2021 - IPC G01S1/08 G01S5/04 G01R29/08 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering and can be used in radio monitoring systems when solving the task of hidden determination of radio-frequency source (RFS) coordinates, in conditions of a priori uncertainty relative to polarization and spatial parameters of radio signals, noise and interference when requirements are met to minimize overall dimensions of direction-finding antenna system, in particular, for determination of RFS coordinates from aircraft board. Method is based on measurement using TOLAS orthogonal components H_x1, H_y1, H_z1 and H_x2, H_y2, H_z2 vectors of magnetic field intensity and with interval equal to quarter of period of electromagnetic wave T / 4 of measured radio signal at moments of time t₁ and t₂, determination of orientation of vectors and in space, construction of auxiliary planes Ω_H1 and Ω_H2, plotting the position line RFS l, selecting the Earth's surface as the surface of the RFS position, calculating the RFS coordinates at the intersection of the position line RFS l with the Earth's surface.

EFFECT: reduced time spent on determination of coordinates of RFS, based on use of tri-orthogonal loop antenna system (TOLAS), consisting of three antenna elements in form of frames.

1 cl, 10 dwg