Effect of Wall Shaking Amplitude on Vibrating Intrinsic Reverberation Chamber Characteristics

A reverberation chamber is capable of generating and measuring electromagnetic fields and is used for electromagnetic compatibility test evaluations of electrical and electronic equipment and systems. While the mechanical stirring type is generally the mainstream, a vibrating intrinsic reverberation chamber (VIRC), which is based on an electromagnetic shielding tent made of flexible conductive fabric, is attracting more interest because it is less expensive and is able to perform in-situ tests. In this article, we presented a VIRC configuration and measured its basic characteristics, i.e., the number of independent samples, the goodness of fit to the Rayleigh distribution and the field uniformity, depending on the wall shaking amplitude as a stirring condition. The measurement results contribute to derive a guideline for the VIRC design, i.e., the wall shaking amplitude should be more than one-eighth of the wavelength at the test frequency.