Calculation of antenna pattern influence on radiated emission measurement uncertainty

In radiated emission measurements an error is introduced by the directive receive antenna. The Monte Carlo Method was used to calculate this error where measured antenna pattern had been taken into account. Although there are large differences between the classical test set-up and the two improvements antenna tilting and antenna bore sighting the impact to the measurement uncertainty is low. For a test distance of 3 m the measurement uncertainty can be reduced from 5.62 dB to 5.43 dB with antenna tilting. With a bore sight antenna tower a reduction to 5.31 dB is feasible. The bias and uncertainty given by CISPR 16-4-2 are not adequate.