Novel Calibration Technique for EMI Antenna Using Reverberation Chamber

摘要

A reverberation chamber can create a multipath environment. When two antennas are placed opposite each other in an ideal reverberation chamber, the mean value of the complex received value equals the direct wave component between them because the vector sum of 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. However, when using conventional reverberation chambers, reflected waves with unvarying path lengths off of walls without a stirrer are included in the mean value. We describe a novel technique for reducing the effect of these reflected waves. The experimental results show the efficacy of this technique for calibrating EMI antennas using the reverberation chamber.