Field uniformity evaluation of different stirrer structure in a reverberation chamber

Abstract

The reverberation chamber (RC) as an economical facility in EMC need to be evaluated especially its field uniformity. The function of a reverberation chamber is to produce a statistically uniform environment for most locations within the defined working volume. One of the factors that affect the uniformity of electric field in the reverberation chamber is the stirrer efficiency. This paper presents an evaluation of field uniformity for two different stirrer structures inside a 2.20 m × 2.25 m × 3.70 m reverberation chamber. The evaluation was done in the frequency range from 250 MHz to 350 MHz. The standard deviations were calculated at several frequencies between this frequency range. The simulation results show that the field uniformity inside a reverberation chamber can be improved using different structure of stirrer.