EMC Measurement System Based on Software Defined Radio and Diagnostic Techniques

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In a previous paper a new referenceless measurement set-up based on a reference antenna was used for characterizing the radiation of antennas in the planar scanner. The method is based on using a low-cost receiver to retrieve the amplitude and phase of the signal. This paper explores the limitations of the method for different geometries and implements a multiprobe electromagnetic compatibility measurement system. Once the amplitude and phase are recovered, diagnostic techniques can be applied and also near-field to near or far-field transformations to calculate the field at distances defined by standards. The results demonstrate the good accuracy of the method in comparison with traditional electromagnetic compatibility laboratories.

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