FIELD: radio engineering, communication.
SUBSTANCE: remote detection of a substance based on remote excitation by an electromagnetic wave of magnetic resonance in the substance with subsequent measurement of the response frequency, the presence of which makes a conclusion about the presence of this substance, contains a stage, in which, in the process of converting the frequency of the reflected signal with left circular polarization, the total voltage frequency is separated, it is detected and the predetected voltage is used to allow the multiplication of the voltage intermediate frequency reflected signal with right circular polarization.
EFFECT: increasing the noise immunity of signal reception and reliability of the substance detection.
2 cl, 4 dwg
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