Aperture arrays designed to provide airflow through shielding enclosures can provide part of the coupling path from interior sources to external electromagnetic interference (EMI). In this work, radiation through aperture arrays is investigated numerically and experimentally. FDTD modeling is compared with measurements on aperture arrays in a test enclosure. The method of moments (MoM) is also utilized to study radiation from apertures and to investigate the mutual coupling between apertures in an infinite conducting plane. A simple design equation for the relation between aperture size and number and shielding effectiveness is proposed.


Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

EM Radiation; EMI; FDTD; MoM Modeling; Airflow Aperture Arrays; Aperture Number; Aperture Size; Coupling Path; Design Equation; Electromagnetic Coupling; Electromagnetic Fields; Electromagnetic Interference; Electromagnetic Shielding; Experiments; Finite Difference Time-Domain Analysis; Infinite Conducting Plane; Integral Equation; Integral Equations; Measurements; Method of Moments; Mutual Coupling; Packaging; Radiated Fields; Shielding Effectiveness; Shielding Enclosures; Test Enclosure

International Standard Serial Number (ISSN)

0018-9375; 1558-187X

Document Type

Article - Journal

Document Version

Final Version

File Type





© 2000 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Aug 2000