NONLINEAR RADAR FOR DETECTING RADIOELECTRONIC DEVICES Russian patent published in 2014 - IPC G01S13/88 

FIELD: radio engineering, communication.

SUBSTANCE: disclosed device includes a reference generator, multitapped delay lines, phase changers, adders, a transmitter, transmitting and receiving antennae, as well as receivers, detectors and display devices, connected to each other in a certain manner.

EFFECT: stabilising the probability of detecting objects with nonlinear electrical properties of different types owing to simultaneous matched filtering at 2f₀ and 3f₀ harmonics of a probing signal, parallel matched processing of received echo signals in two channels, each tuned to its own harmonic 2f₀ and 3f₀, where f₀ is the carrier frequency of the transmitting channel, independent of the type of the nonlinear object.

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