Using Nested Reverberation Chambers to Determine the Shielding Effectiveness of a Material: Getting Back to the Basics With a "Lei"-Person\´s Approach

We examine an existing method for determining the shielding effectiveness of a material using nested reverberation chambers and then present an alternate derivation based on measurement intuition. Included in our examination is a discussion of the purpose for using a four antenna measurement system and a simplification of the equations used in the data processing portion of the measurement. The result of this approach will be a measurement process that is more intuitive and makes use of S-parameters along with power ratios in all portions of the measurement effort. To validate our simplifications and data processing methods, we provide an experimental demonstration and verification.