Advances in Radio Science www.adv-radio-sci.net 1684-9965 1684-9973 3 Kleinheubacher Berichte 2004 2005 10.5194/ars-3-105-2005 http://www.adv-radio-sci.net/3/105/2005/ http://www.adv-radio-sci.net/3/105/2005/ars-3-105-2005.html http://www.adv-radio-sci.net/3/105/2005/ars-3-105-2005.pdf 105 109 2005-05-12 Evaluation of Measurement Uncertainty of Radiated EMC Tests in Arbitrary Field Generators using Surface Currents on DUT T. Schrader K. Münter M. Spitzer N. Eulig A. Enders Physikalisch-Technische Bundesanstalt, AG 2.21, Bundesallee 100, 38116 Braunschweig, Germany Institut f&#x00FC;r Elektromagnetische Vertr&#x00E4;glichkeit, Technische Universit&#x00E4;t Braunschweig, Schleinitzstraße 23, 38106 We present a method for the evaluation of measurement uncertainty in radiated EMC tests. It is based on the measurement of surface current densities on a sphere, the results are compared to the surface current distribution on a sphere in a free-space environment obtained by numerical calculations. The free-space is considered to be a reference field generator. By this method we avoid burdening any systematic deviations of one particular (historic) method to any of the others. We evaluate the ratio <b><i>J/E</i></b> of the measured surface current density <b><i>J</i></b> and the measured empty electrical field strength <b><i>E</i></b> for both the reverberation chamber and the semi-anechoic chamber.