METHOD OF PULSE-DOPPLER RADIOLOCATION AND DEVICE WITH AUTODYNE TRANSMITTER FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC G01S13/18 G01S13/34 G01S13/42 G01S13/53 G01S13/93 G01S7/288 

FIELD: radio equipment.

SUBSTANCE: invention relates to systems of short-range radar (SRR) with determination of range by measuring the delay time of a radio pulse reflected from an object of location and the relative speed of movement according to the Doppler frequency shift. It can be used in systems for detecting and determining the parameters of movement of targets in a controlled area, for example, in systems for preventing collisions of vehicles. In the claimed method, radio pulses are obtained at the output of the RF generator by impacting the RF generator with a sequence of paired trigger pulses with steep fronts, while forming coherent oscillations inside the paired radio pulses relative to the trigger pulses. The first radio pulses of each pair are probing, and the second pulses are receiving. The oscillation frequency of the probing radio pulses is switched to the value of the intermediate frequency (IF) relative to the frequency of the receiving radio pulses, the probing radio pulses are emitted into the controlled space and radio pulses reflected from the target are received and mixed with the natural oscillations of the RF generator during the formation of receiving radio pulses in it, causing autodyne changes in the amplitude of oscillations in the RF generator as well as current and/or voltage in its power supply circuit in the form of RF radio pulses, after which autodyne changes are isolated in the form of RF radio pulses. The RF radio pulses are mixed in a quadrature mixer with the reference IF oscillations and converted to the low Doppler frequency region in the form of quadrature video pulses and , after which a sample of instantaneous values of quadrature video pulses and is stored, according to the values of which further information is obtained about the presence of the target, the range and parameters of its movement. A pulse-Doppler radar device with an autodyne transceiver for implementing the method is also claimed.

EFFECT: increased range of the SRR, increased reliability of detection and the accuracy of determining the parameters of the target movement by achieving coherence of probing oscillations and receiving radio pulses, as well as reducing the consumption of the supply current and the level of radiation leakage due to the transfer of the autodyne generator to a pulsed mode of operation, as well as simplifying the design of the high-frequency (HF) part of the SRR.

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