PARAMETRIC SCATTERER-MARKER WITH NONLINEAR CLOCK SIGNAL GENERATION Russian patent published in 2014 - IPC G01S13/75 

FIELD: radio engineering, communication.

SUBSTANCE: in order to apply coherent accumulation when detecting single-loop parametric scatterers, with simultaneous radiation of pumping radio pulses at frequency f, the parametric scatterer generates a clock signal at frequency f/2. Frequency selection is facilitated using a method for nonlinear generation of clock signals, wherein clock signals at frequency 0.5f are generated directly in the parametric scatterer as a result of nonlinear conversion. To this end, one or two additional signals at frequencies f₁ and f₂ are emitted in the spectrum of the probing signal besides the signal at pumping frequency f. One of the nonlinear conversion frequencies of the probing signal must be equal to the generation frequency of the parametric scatterer: nf±mf₁±kf₂=0.5f, where n, m, k can assume integer values from 0 to 2. In the disclosed solution, nonlinear conversion is proposed on a nonlinear scatterer included in the design of the parametric scatterer-marker.

EFFECT: eliminating coherent interference with a radio receiver.

2 dwg