EMC Measurement in a Reverberation Chamber

A reverberation chamber, which is a test facility for various electromagnetic compatibility tests, uses a stirrer to generate a uniform electric field inside it. However, a stirrer is a big unit and has difficulties in maintenance. This paper adopted an idea of a diffuser from acoustics to overcome the problems of a stirrer and presents a substitution effect of a diffuser for a stirrer. To validate the substitution effect of a diffuser, a diffuser and a reverberation chamber for 3.0-5.0 GHz band are designed and fabricated. And the real measurement for analyzing the electric field uniformity in a reverberation chamber is done. The measurement results show that the reverberation chamber with a diffuser satisfies the international standard requirement.