ZERO RADIOMETER Russian patent published in 2018 - IPC G01R29/08 

FIELD: measuring equipment.

SUBSTANCE: zero radiometer comprises an antenna, a matched load connected to the first input of a modulator, a radiometric receiver, series-connected pulse amplifier, a high-pass filter, a synchronous low-pass filter, a comparator, a control unit. The first and second outputs of the control unit are connected to the control inputs of the modulator and the synchronous low-pass filter, respectively, and the third output is the output bus of the radiometer. The common bus of the radiometer is connected to the second input of the comparator. The matched load and the modulator are mounted on the thermostatically controlled plate. A high-frequency key, the first switch, connected to the output of the radiometric receiver with its input, are additionally introduced. Its first and second outputs are connected to the same inputs of the second switch, respectively. The first output is connected directly, and the second - through the voltage divider. The output of the second switch is connected to the input of the pulse amplifier and control inputs of the first, second switches and the high-frequency key are grouped together and connected to the fourth output of the control unit. The antenna is connected to the second input of the modulator, whose output is connected to the input of the radiometric receiver through the high-frequency key.

EFFECT: simplifying the radiometer circuit and increasing the accuracy of measurements.

4 dwg