Research on the interference mechanism & radiated characteristic of EFT/B

According to the mathematical expression recommended by IEC 61000-4-4 2012, this paper analyzed the interference mechanism of EFT/B both in time and frequency domain. The radiated field strength was evaluated by the transient electromagnetic field measurement system based on optical fiber transmission. The distribution of the maximum field strength is presented along the plane of clamp in horizon direction (0~200cm) and vertical direction (0~50cm) at the point 50cm and 100cm. The measurement results are analyzed and some distorted waveforms and data were eliminated.