EM Field Uniformity Analysis of RRA Reverberation Chamber

Abstract

This study presents the electromagnetic (EM) field uniformity analysis of the Korean National Radio Research Agency (RRA) reverberation chamber (RC). The analysis is performed using the normative procedure of IEC 61000-4-2 for the estimation of the lowest usable frequency (LUF) of the RRA RC based on the field uniformity analysis. The triaxial electric fields at the 8 corners of the defined working volume are measured using electric field probes for the complete rotation of mechanical stirrer. The data is obtained for the frequency range of 80 MHz -1000 MHz with 85 frequency samples as per standard requirements through the designed data acquisition software. The stirrer step size was $7.2 {o}$ which results in 50 steps of the stirrer for one complete rotation. The post-processing of the experimental data in terms of calculation of standard deviation of measured Efield data and its comparison with the defined standard deviation limit in IEC 61000-4-21 standard is performed to obtain the lowest usable frequency of the RRA reverberation chamber.