METHOD FOR DETERMINING DISTANCE TO RADIATION SOURCE WITH DIRECTIONAL ANTENNA Russian patent published in 2012 - IPC G01S5/06 

FIELD: radio engineering.

SUBSTANCE: measuring base implements the removal of signal amplitudes proportional to the field intensity, as per which the main lobe of antenna beam of radiation sources is restored in linear measure. Determination of the distance to radiation sources is achieved by means of calculation of the ratio of calculated width of radiation source antenna beam in linear units to the width value of antenna beam, which is taken from database, in angular radian measure.

EFFECT: possibility of passive determination of the distance to radiation sources with directional antenna oriented with its main lobe to direction finder antenna; the latter forms together with antennae of additional receiving stations the measuring base the size of which is much smaller than that during implementation of the known time-difference direction determining method, which in its turn allows eliminating communication channels for transfer of received signals to distance calculation station, and as a whole, applying the method on movable direction finder carrying object.

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