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In this paper, we describe the realization of a low cost radiometer which can be used to detect and show the microwave electromagnetic field emitted from human body. The system uses components available in the consumer market: low cost LNB (Low Noise Block: low noise pre-amplifier, mixer and post-amplifiers) and a parabolic antenna for satellite TV. The base line stability problems of the system are removed using a detector in linear region and a digital integrator for correction of the base line. The PC resident software triggers an educational video on the origins of electromagnetic radiation when a person, entering in the antenna beam, is detected; in addition to this, it is possible to show an infrared image taken by a camera.

LOW COST COMPONENTS RADIOMETER IMPLEMENTATION FOR HUMAN MICROWAVE ELECTROMAGNETIC FIELD EMISSION DETECTION