EMI from slots and apertures resulting from coupling of interior sources through enclosure cavity modes in a Sun S-1000 workstation was investigated. The excitation of a specially designed rectangular enclosure with a slot was also studied experimentally and with finite-difference time-domain (FDTD) simulations. The radiated power results for both the S-1000 and simple rectangular enclosure indicate that radiation at cavity mode resonance frequencies through slots and apertures can be as significant as at aperture or slot resonances. A decrease of the radiation through the slots and apertures can be achieved by employing a lossy material in the enclosure.

Meeting Name

IEEE International Symposium on Electromagnetic Compatibility (1997: Aug. 18-22, Austin, TX)


Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

EMI; Sun S-1000 Workstation; Aperture Resonance; Apertures; Electromagnetic Interference; Electromagnetic Shielding; Enclosure Cavity Modes; Finite Difference Time-Domain Analysis; Finite-Difference Time-Domain Simulation; Interior Sources Coupling; Radiated Power; Rectangular Enclosure; Slot Resonance; Slots; Workstations; Cavity Resonators; Circuit Resonance; Computer Simulation; Computer Workstations; Electric Excitation; Finite Difference Method; Natural Frequencies; Time Domain Analysis; Cavity Mode Resonances; Electromagnetic Wave Interference

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 1997 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Aug 1997