In this letter, measurement results show that the applicability condition of the approximate measurement model (MM), referred to as SE3, in which multiple interactions are neglected, can be easily satisfied even for very large apertures in nested reverberation chambers. The applicability condition of the MM, referred to as SE4, is also tested both directly, as the ratio between the MMs SE3 and SE4, and indirectly, in terms of the SE of the fixture. The results are very useful in the improvement process of Annex G in Standard IEC 61000-4-21. To better understand the origins of the measurement results, the first part of this study presents a physical interpretation of the coupling chambers grounded in the power balance principle.
On the Applicability Conditions of Approximate Measurement Models for Shielding Effectiveness Using Coupled Reverberation Chambers
Angelo Gifuni
2026-01-01
Abstract
In this letter, measurement results show that the applicability condition of the approximate measurement model (MM), referred to as SE3, in which multiple interactions are neglected, can be easily satisfied even for very large apertures in nested reverberation chambers. The applicability condition of the MM, referred to as SE4, is also tested both directly, as the ratio between the MMs SE3 and SE4, and indirectly, in terms of the SE of the fixture. The results are very useful in the improvement process of Annex G in Standard IEC 61000-4-21. To better understand the origins of the measurement results, the first part of this study presents a physical interpretation of the coupling chambers grounded in the power balance principle.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
