Interlaboratory comparison of radiated emission measurements using a spherical dipole radiator

An interlaboratory radiated emission comparison has been performed, compari ng electric field strength measurements in the frequency range 30-1000MHz a t a 10m open area test site. A spherical dipole radiator is employed as a r eference emitter. Comparison results are presented in terms of measurement repeatability of electric field strengths measured at test sites for each f requency. Expanded uncertainty for the 95.45% confidence level is evaluated to be +5.61-5.7dB and +4.91-4.8dB for the frequency ranges corresponding t o biconical and log-periodic antennas, respectively. Uncertainty analysis d emonstrates that the uncertainty mainly stems from the antenna factor calib ration, mismatch, the performance of a receiver and site imperfection.