Research on the Uncertainty of Radiated Emission Test System of High Speed Train

In electromagnetic compatibility testing, uncertainty is a measure of base standard and check, test and calibration level, the basis of measurement traceability and an indicator of test system quality. In reference [ 1 ] the method and steps for evaluation of the uncertainty of radiated emission fi eld intensity measurement is discussed by taking the electromagnetic compatibility laboratory of national engineering research center of converter technology as an example. In reference [2] the method and steps for evaluation of the uncertainty of 30M-1GHz radiated emission in 3m semi anechoic chamber is described. In reference [3] the site and method of antenna calibration test is introduced and the uncertainty of broadband calibration system with antenna is analyzed. As the uncertainty of radiated emission system is now studied in laboratories rather than under fi eld test conditions, this paper explored this aspect. This is of great practical significance to improve the accuracy of EMC test against EMU.