EMI through perforation patterns for airflow in shielding enclosures resulting from coupling of interior sources is investigated numerically with FDTD simulations and experimentally. The FDTD simulations are compared with measurements on perforation patterns. A simple empirical design approach for the relation between aperture size, the number of apertures and shielding effectiveness is extracted. A double perforation pattern structure is proposed for perforation pattern designs where a high percentage of open area is required. Frequencies where the enclosure will support cavity modes are of primary concern

Meeting Name

1998 IEEE International Symposium on Electromagnetic Compatibility, 1998


Electrical and Computer Engineering

Keywords and Phrases

EMI; FDTD Simulations; Airflow Aperture Arrays Design; Aperture Size; Cavity Modes; Double Perforation Pattern Structure; Electromagnetic Interference; Electromagnetic Shielding; Finite Difference Time-Domain Analysis; Interior Sources Coupling; Open Area; Perforation Pattern Measurements; Perforation Patterns; Shielding Enclosures

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 1998 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.