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A Stack of Metal Rings for Reducing Common-Mode Current on a Wire Passing through an Aperture
IEICE TRANSACTIONS on Communications
Publication Date: 2005/09/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electromagnetic Compatibility(EMC)
common-mode current emission, electromagnetic radiation, EMI filter, aperture coupling, wire antenna,
Full Text: PDF(727.6KB)>>
Unwanted electromagnetic emission occurs due to the common-mode current on the cables entering a PC's metal enclosure and can be treated as wire antennas passing through the apertures of the enclosure. To reduce the emission, a stack of metal rings is suggested to be placed around the cable and external to the aperture, adopting the concept of a Coaxial Band-Stop Filter, for the first time. The influence of this novel structure on the common-mode current is examined in the FDTD-method frame work.