Improvement on Magnetic Shield Performance of Metal Enclosure with Periodically Arranged Apertures in kHz Bands

Yoshihito OTOI  Ryosuke SUGA  Tomoki UWANO  Osamu HASHIMOTO  

Publication
B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)   Vol.J101-B   No.7   pp.539-545
Publication Date: 2018/07/01
Online ISSN: 1881-0209
DOI: 
Type of Manuscript: Special Section PAPER (Special Section for Encouraging Young Researchers)
Category: 
Keyword: 
metal enclosure,  metal plate with apertures,  double-layer,  magnetic shielding effectiveness,  kHz bands,  

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Summary: 
This paper improved the shielding performance of the metal enclosure with periodically arranged apertures in kHz bands. The performance is deteriorated owing to the current flowing the surface of the apertures. Hence, the enclosure applied to the double-layered metal plate with apertures is proposed for the suppression of the current. The shielding effectiveness of the proposed enclosure versus the gap between the plates, and its frequency characteristics were evaluated. As a result, the shielding effectiveness is improved by a maximum of 19 dB than the enclosure with the single-layered plate.