Shielding effectiveness measurements of materials and enclosures using a dual vibrating intrinsic reverberation chamber

Reverberation chambers create a statistical uniformly distributed field which is very useful for shielding effectiveness measurements. Two adjacent reverberation chambers made of flexible cloth have been developed and are used for shielding effectiveness measurements. The field stirring is achieved by moving the (angle of) the walls. The common wall of the adjacent chambers forms the interface where many different types of materials and structures can be exposed to high field strength. Any leakage in the other chamber is reflected multiple times. This setup makes it possible to achieve a very high dynamic range. A main advantage of this technique compared to the nested reverberation set-up is that measurements can be conducted much faster, and at much lower frequency.