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Paper Abstract and Keywords
Presentation 2008-04-25 13:35
Experimental Investigation about Shield Effectiveness of Cooling Air Hatches
Kentaro Ogura, Yuichi Sasaki, Chiharu Miyazaki, Naoto Oka, Yoshihiko Konishi (Mitsubishi Electric Corp.) EMCJ2008-3
Abstract (in Japanese) (See Japanese page) 
(in English) Upper frequency of the radiated EMI regulation VCCI for information technology equipment will be expanded to 6 GHz. If cooling air hatches are installed in equipments, shield characteristics are deteriorated by cooling air hatches. When a constant area for cooling air hatches is retained, the segmentation method of air hatches is needed to suppress the deterioration of shield characteristics. The purpose of this article is to investigate about shield effectiveness of segmented cooling air hatches. At first, we investigated the shield effectiveness of air hatches when air hatches were located in the single direction. In our measurement, the polarization of an electric field was vertical. If an air hatch in constant area was divided to N air hatches placed in a horizontal direction, the amount of deterioration of the shield effectiveness by an increase in the number was less than the amount of improvement of the shield effectiveness by a shortening of an air hatch length. On the other hand, if an air hatch in constant area was divided to N air hatches placed in a vertical direction, the shield effectiveness was confirmed to be no change. As a result, if an air hatch was divided to N×N air hatches, the shield effectiveness has been improved with an increase in the number, and the experimental equation of shield characteristics was derivated.
Keyword (in Japanese) (See Japanese page) 
(in English) Shield effectiveness / Radiated EMI / Air hatch / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 21, EMCJ2008-3, pp. 13-18, April 2008.
Paper # EMCJ2008-3 
Date of Issue 2008-04-18 (EMCJ) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EMCJ  
Conference Date 2008-04-25 - 2008-04-25 
Place (in Japanese) (See Japanese page) 
Place (in English) NTT Information Sharing Lab. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMCJ 
Conference Code 2008-04-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental Investigation about Shield Effectiveness of Cooling Air Hatches 
Sub Title (in English)  
Keyword(1) Shield effectiveness  
Keyword(2) Radiated EMI  
Keyword(3) Air hatch  
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1st Author's Name Kentaro Ogura  
1st Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
2nd Author's Name Yuichi Sasaki  
2nd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
3rd Author's Name Chiharu Miyazaki  
3rd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
4th Author's Name Naoto Oka  
4th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
5th Author's Name Yoshihiko Konishi  
5th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
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Speaker
Date Time 2008-04-25 13:35:00 
Presentation Time 25 
Registration for EMCJ 
Paper # IEICE-EMCJ2008-3 
Volume (vol) IEICE-108 
Number (no) no.21 
Page pp.13-18 
#Pages IEICE-6 
Date of Issue IEICE-EMCJ-2008-04-18 


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