TIME-FREQUENCY CODED RADIO-PULSE SIGNAL MONOPULSE INTEROGATOR RECEIVER Russian patent published in 2018 - IPC H04B1/06 G01S1/60 G01S13/44 

FIELD: radar ranging and radio navigation.

SUBSTANCE: invention relates to radar technology, in particular to radar with an active response, which is used to control air traffic, identify, measure distances in navigation systems. Essence of the invention consists in that the device contains two reception channels: the total (Σ) and difference (Δ) connected to the inputs of the first hybrid 90° scheme, to the outputs of which the first and second limiters are connected, the outputs of which through directional couplers are connected to the inputs of the second hybrid 90° circuit, whose outputs through the first and second detectors are connected to the inputs of the subtractor, at the output of which a signal is determined, depending on the ratio U_Σ/U_Δ, in addition, the second outputs of the directional couplers are connected to the inputs of the phase detector, the output of which is connected to the input of the comparator, at the output of which the sign of the target deviation from the interrogator axis is determined, to the output with the signal jΣ of the second hybrid 90° circuit, a high-frequency filter is connected to the output of which a mixer is connected, to the second input of which is connected getorodin, third limiter is connected to the output of the mixer, to the output of which are connected in parallel the circuits, the number of which is determined by the number of frequencies in the time-frequency coded signal, consisting of a series-connected intermediate frequency filter, detector, threshold device and key, the control inputs of the keys are connected to the output of an additional threshold device whose input is connected to the output of the subtractor. Outputs of the keys are the outputs of the signals to the decoder of the response signals. Outputs of the comparator and subtractor are outputs to the monopulse processor.

EFFECT: obtaining information when there are several carrier-frequencies and the information is embedded in the sequence order of frequencies, their values and pulse delay of frequency-time coded response signals relative the first signal.

1 cl, 2 dwg