METHOD FOR ESTIMATING EXCESS OF SECONDARY MICROWAVE RADIATION INTENSITY OVER THERMAL RADIATION INTENSITY

摘要

The present invention relates to biology and medicine and can be used for determining radiophisical characteristics and diagnosing the state of biological objects. The proposed method for estimating excess of secondary microwave radiation intensity over thermal radiation intensity consists in receiving, by an antenna and a receiver, a thermal radiation signal from the object together with a noise signal, cyclically interrupting the reception of the thermal radiation signal, amplifying the noise signal at intervals between the reception of the thermal radiation signal, determining and storing the first difference signal, connecting, at intervals between the reception of the thermal radiation signal, a positive feedback circuit to the input of the receiver, adjusting the positive feedback gain so as to provide zero value of the first difference signal, storing the first value of the positive feedback gain that corresponds to the said zerovalue of the first difference signal, exposing the object to low-intensity microwave radiation, receiving the summary signal corresponding to the primary and secondary radiation from the object, amplifying the summary signal received together with the noise signal, cyclically interrupting the reception of the summary signal, amplifying the noise signal at intervals between the reception of the summary signal, determining and storing the second difference signal, connecting, at intervals between the reception of the summary signal, a positive feedback circuit to the input of the receiver, adjusting the positive feedback gain so as to provide zero value of the second difference signal, and storing the second value of the positive feedback gain that corresponds to the said zero value of the second difference signal. The said first and second values of the feedback gain are used for determining the excess of secondary microwave radiation intensity over thermal radiation intensity.