Transfer Impedance and Transfer Admittance Measurements on Gasketted Panel Assemblies, and Honeycomb Air-Vent Assemblies

Electromagnetic energy can penetrate incompletely shielded enclosures through the action of three different coupling mechanisms. Two of these mechanisms, diffusion through the thickness of the shield and magnetic field coupling through imperfec­ tions in the shield, can be combined and represented as a Transfer Impedance which relates the magnetic field at the outer surface of the enclosure to the resulting electric field induced along the inner surface.