Equivalent Simulation Approach for the Shielding Effectiveness of Enclosures With Gasketed Seams

The gasketed seam is a critical factor affecting the shielding effectiveness of the enclosure. To accurately simulate the shielding effectiveness of the enclosure, it is necessary to model the gasketed seam. However, due to the complex microstructures on the contact surface of the gasketed seams, directly measuring and modeling the gasketed seams is challenging. To address the issue, this work puts forward an equivalent modeling approach. Based on the constraint that the transfer impedance is constant, the gasketed seams are modeled as isotropic regular structures instead of modeling the geometrical details. The transfer impedance can be made identical under different modeling conditions by establishing a connection between the key parameters (including the geometric and material-related ones) and the measured transfer impedance of the gasketed seam. This ensures that the electromagnetic field leakage through the gasketed seam remains consistent, ultimately achieving equivalent shielding effectiveness. In this way, modeling and simulating gasketed seams become straightforward and practical while keeping calculations accurate. Experimental results confirm the effectiveness of the equivalent modeling approach.