METHOD OF DETERMINING COORDINATES OF A RADIO-FREQUENCY SOURCE FROM AN AIRCRAFT BOARD USING A COMBINED TRI-ORTHOGONAL 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 for minimization of overall dimensions of direction-finding antenna system, in particular for determination of RFS coordinates from aircraft (AC) board. Method is based on measurement by CTOAS of orthogonal components E_x1, E_y1, E_z1 of electric field intensity vector , as well as orthogonal components H_x1, H_y1, H_z1 of magnetic field intensity on board AC at time t₁, determination of orientation of vectors and in space, construction of auxiliary planes Ω_E1 and Ω_H1, constructing lines of position RFS l at intersection of auxiliary planes Ω_E1 and Ω_H1, selection of the Earth's surface as a surface of the RFS position, calculation of the RFS coordinates at the intersection point of the position line RFS l with the Earth's surface.

EFFECT: reduced time spent on determining coordinates of RFS, based on use of a combined tri-orthogonal antenna system (CTOAS), consisting of three antenna elements in form of asymmetrical dipole-type dipoles and three frame antenna elements.

1 cl, 14 dwg