Determination of EMI antenna factor using reverberation chamber

Abstract

The EMI antenna is generally calibrated at open area test sites or in anechoic chambers. We propose a novel method of calibrating the EMI antenna using a reverberation chamber. When two antennas are placed opposite each other in an ideal reverberation chamber, the mean value of the complex received value equals the free-space propagation loss between them because the vector sum of the reflected waves with random phases is zero. Therefore, the free-space antenna factor can be determined from the mean value of the complex received value. Experimental results showed the efficacy of this method for calibrating EMI antennas