ABSTRACT
The electromagnetic interference (EMI) shielding of large-area openings or apertures for access to electronics, ventilation, and displays is one of most important requirements to ensure the shielding integrity of electronic equipment enclosures. In addition to panel meters, digital displays, oscilloscopes, status monitors, mechanical indicators, or other readouts, the most critical display shields against EMI are largearea, high-resolution monitors (cathode ray tubes; Carter 2004; Grant 1984). EMI shielding of these large apertures of the integrated enclosures are generally more challengeable than those encountered for cover plates, doors, and small apertures, such as connectors, switches, and other controls in which the majority of the opening is covered by a continuous homogeneous conductive plate. Therefore, a variety of window panels made from conductive foam, waveguide honeycomb, metallized fabrics, and other ventilation structures have been developed and utilized to meet the EMI shielding requirements of the large-area openings and ventilation apertures.
