Microwave-range shielding effectiveness measurements using a dual vibrating intrinsic reverberation chamber

Reverberation chambers create a statistical uniformly distributed field which is very useful for reliable electromagnetic interference measurements. Another advantage of these chambers is the high field strength which can be generated compared to conventional test setups. A reverberation chamber made of flexible cloth is called a vibrating intrinsic reverberation chamber (VIRC) and the field stirring is achieved by moving the (angle of) the walls. A new technique for shielding effectiveness measurements is the dual-VIRC method. In this method two VIRCs are combined together via a common wall with an aperture that forms the interface between them. This set-up 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.