Abstract
The hypothesis upon which the present accepted theory of shielding consisting of the equation SE = R + A + B is based is presented. The hypothesis is based on wave theory and the analogy between transmission lines and the penetration of a wave through a barrier. A detailed analysis, comparing the value of the current delivered to a load impedance using circuit theory and wave theory, is conducted. The results of the analysis illustrate that for wave theory to provide accurate results, specific boundary conditions must be met. This leads to the conclusion that wave theory is only a theory and the hypothesis upon which the present accepted theory of shielding is invalid. This leads to the conclusion that the present accepted theory of shielding yields inaccurate results.
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Notes
- 1.
Note: 1/RL yields percent or power absorbed by load
RC = 1-(1/RL) yields percent of reflected power
References
Kunkel G (2018) Testing of EMI gaskets. Evaluation Engineering Magazine
Frederick Research Corp (1962) Handbook of radio frequency interference, vol 3 (Methods of Electromagnetic Interference Suppression). Frederick Research Corp., Wheaton, MD
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Kunkel, G.M. (2020). Shielding Effectiveness Theory of Shielding. In: Shielding of Electromagnetic Waves. Springer, Cham. https://doi.org/10.1007/978-3-030-19238-9_10
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DOI: https://doi.org/10.1007/978-3-030-19238-9_10
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