CALORIMETRIC MICROWAVE RADIATION POWER METER

摘要

The proposed calorimetric microwave radiation power meter contains a waveguide section with a load equivalent, a calorimetric element with a thermopile, a matching direct voltage amplifier, an indicating unit, and additionally, two two-pole automatic switches, an analog-to-digital converter, a microprocessor control unit, a digital-to-analog converter, a direct voltage-to-direct current converter, and a digital indicator. The input of the first switch is connected to the terminal of the thermopile, and the first output is connected to the input of the amplifier. The input of the analog-to-digital converter is connected to the output of the amplifier, and the output is connected to the input of the control unit. The input of the digital-to-analog converter is connected to the first output of the control unit, and the output is connected to the input of the direct voltage-to-direct current converter. The first input of the second switch is connected to the output of the direct voltage-to-direct current converter, the second input is connected to the second output of the first switch, and the output is connected to the input of the indicating unit. The second output of the control unit is connected to the input of the digital indicator, and the third, fourth, and fifth outputs are accordingly connected to the control inputs of the switches and the analog-to-digital converter. As the thermopile, a multielement thermoelectric converter is used that contains semiconductor electrodes made of material with electron and hole conduction.