Radiated Emission Estimation of a Metallic Enclosure Model Source by Inverse-Forward Analysis

Shose HAYASHI  Koichiro MASUDA  Ken-ichi HATAKEYAMA  

IEICE TRANSACTIONS on Communications   Vol.E78-B   No.2   pp.173-180
Publication Date: 1995/02/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electromagnetic Compatibility)
inverse problem,  numerical analysis,  electromagnetic field analysis,  EMC requirement,  EMC,  

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For estimating the radiated emission from a metallic enclosure, the authors have developed a numerical computational method which applied inverse analysis. A metallic enclosure containing a loop antenna was set up to be a model source for the numerical analysis. Magnetic fields around the enclosure were measured by measurement systems fabricated in the authors' laboratory. Using the measured magnetic fields, current distributions on the enclosure surface were determined by means of an inverse analysis utilizing the least squares method. From this surface current distribution, the electromagnetic field distributions were estimated by forward analysis on a cylindrical surface 3.0m in radius. The amount of the error in the estimated fields distribution was also discussed.