METHOD OF ACTIVE NONLINEAR PHASE RADIO RANGE FINDING Russian patent published in 2018 - IPC G01S13/32 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to the field of radio engineering, in particular to methods of nonlinear radio range finding of radio emission sources, and can be used to detect and measure the distance to emitting objects with nonlinear electrical properties, in particular radio transmitters. Result is achieved by the fact that the source of radio emission with nonlinear electrical properties, the distance to which it is necessary to measure, irradiated by an external electromagnetic field whose frequency is slightly different from the frequency of the oscillations of the radio emission source by measuring the phase difference between the received oscillation of the first combinational component and the reference oscillation of the same frequency, formed in the radio range finder by multiplying the received signal of the radio-emission source and the signal emitted by the radio-undistorted transmitter with the subsequent allocation of their difference frequency, determine the distance to the source of the radio emission. Taking into account that the wavelength of the received oscillation of the first combinational component exceeds the wavelength of the irradiating oscillation, as a rule, by several orders of magnitude, then the range of unambiguous range measurement is significantly increased in comparison with the conventional phase method of linear ranging with the same irradiation frequency, which leads to a decrease in the error in the range measurement.

EFFECT: reduction of the error in measuring the range to a source of radio emission with nonlinear electrical properties by expanding the range of unambiguous range measurement.

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