METHOD FOR DETERMINING DIRECTION TO RADIATION SOURCE WITH PHASE DIRECTION FINDER Russian patent published in 2024 - IPC G01S3/46 G01S5/04 G01S13/44 

FIELD: radio navigation.

SUBSTANCE: invention can be used to unambiguously determine the angular position in the azimuthal plane of a radiation source with a previously unknown wavelength by a phase direction finder placed on a quadcopter. The claimed method involves receiving a signal from a radiation source in one plane by two omnidirectional antennas installed symmetrically to the building axis of the carrier at a distance from the base, switching the carrier to hover mode when signals from the radiation source are detected, determining the true or opposite bearing to the radiation source based on the maximum level of multiplied signals from the output multiplier, rotating the direction finder around its axis until the signal at the output of the multiplier reaches the zero value closest to the maximum, performing rectilinear movement of the direction finder in the direction finding plane perpendicular to the base, and measuring the value of the signal at the output of the multiplier. At the same time, due to the sequential summation of signals from the output of the direction finder multiplier, as a result of its rotation by 360 degrees, with memorization of the values of the corresponding rotation angles and the summation results, determining the middle of the section with the greatest increase/decrease sequentially at intervals of 120 degrees, where the number of intervals is equal to the full rotation of the direction finder around its axis, divided by a fixed rotation step, selects the true direction to the radiation source from the opposite signal in decreasing order at the output of the multiplier.

EFFECT: eliminating the ambiguity in determining the direction to the radiation source by a phase direction finder, associated with harmonic changes in the phase incursion of the received signal.

1 cl, 1 dwg