METHOD OF DETECTING CONCEALED NONLINEAR RADIOELECTRONIC ELEMENTS Russian patent published in 2014 - IPC G01S13/48 

FIELD: physics, optics.

SUBSTANCE: invention is intended to detect concealed microelectronic devices having operating or inactive elements with a nonlinear voltage-current curve. The method involves transmitting an ultra-wideband pulsed radio signal to a probed region and receiving the reflected signal; further irradiating said region with a monochromatic radio signal which does not overlap on frequency with the ultra-wideband pulse and has power which is sufficient to change the middle operating point of the voltage-current curve of a nonlinear radioelectronic element; comparing amplitude of the reflected ultra-wideband pulses with and without the additional monochromatic radio signal, and presence of a concealed nonlinear radioelectronic element is indicated by mismatch of amplitude values which is higher than the receiver noise level. The probing region is illuminated with a laser beam which is directed on the axis of radiation of the monochromatic radio signal. Significant difference in amplitude of reflected signals can be converted to a light signal and/or a sound-frequency signal which is available for the user.

EFFECT: longer range for detecting nonlinear radioelectronic elements and high accuracy of localisation thereof.

3 cl, 2 dwg