Determination of radiated emissions of an electrically large EUT: simulation and experiment

The radiated emission testing of an electrically large equipment under test (EUT) has been carried out in a mode stirred chamber and a fully anechoic room. The radiation pattern of a rectangular metallic enclosure with a rectangular slot was measured, simulated and compared. The long-term aim of the investigation is the estimation of the directivity of EUTs to correlate measurements of radiated emissions of electrically large EUTs in different test environments. By knowledge of directivity values and the measured total radiated power in an alternative test site, the maximum electric field strength of the EUT could be determined.