Research on the Microwave Radiometer Signal Waveform Simulation

Microwave radiometer is a passive remote sensing instrument, which is used to measure thermal electromagnetic emission from material media. It has been widely used in atmosphere detection, ocean observation, earth observation and other domains. Computer simulation plays an important role in system analysis, design, research and performance testing. This paper firstly presents the radiometer´s framework and simulates the waveform from the antenna´s input noise signal to integrator´s output signal (before A/D convector), Then simulates the linearity of the whole model. The simulation result indicates that the linearity of the radiometer is very well, finally gives the calibration equation of the radiometer.