Abstract
For the absolute measurement of temperature using Radiometer system, Radiometer must be calibrated with known incident power. Calibration setup is indigenously developed to calibrate the various (E, Ka AND F-Band) ECE Radiometer systems available at IPR. "Hot and Cold technique" is used with blackbody sources, one at room temperature and another at Liquid Nitrogen temperature.New calibration technique using DSP, as well as the conventional technique using Lock-in amplifier, are implemented to remove the noise of system. The blackbody sources are chopped with high accuracy DC motor to generate the temperature difference. Calibration coefficients for individual channels are determined. Inherent noise and losses are calculated by analytical way as well as experimental measurements.Theoretical and experimental measurement has shown necessitate for High temperature black body target. Prototype is generated for High temperature blackbody calibration source. Various materials are analyzed for thermal and dielectric properties.
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