Analysis of Electromagnetic Field inside Equipment Housing with an Aperture

Hiroaki KOGURE  Hideki NAKANO  Kohji KOSHIJI  Eimei SHU  

IEICE TRANSACTIONS on Communications   Vol.E80-B   No.11   pp.1620-1624
Publication Date: 1997/11/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on EMC Implications of Densely Mounted Electronic Devices)
equipment housing,  aperture,  electromagnetic field analysis,  the TLM method,  immunity,  

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This paper presents a method of analyzing the electromagnetic field inside an equipment housing. The electromagnetic field is assumed to be coming from outside and coupled into the housing through an aperture on the housing surface. The analysis is based on the transmission-line modeling method. Results of the analysis show a good agreement with the results of measurement. Also, it is found that the coupling through the aperture shows peaks at some frequencies that depend almost only on the structure of the housing and aperture and, therefore, can be estimated at the time of equipment design.