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Paper Abstract and Keywords
Presentation 2011-04-22 13:55
Applicability of an anechoic chamber as test site below 30MHz
Masamitsu Tokuda, Hiroyuki Ohsaki (Univ. of Tokyo), Hiroharu Yamashita, Masahiro Inoue (JET), Mariko Tomisawa, Ryosuke Hasegawa (TCU) EMCJ2011-3
Abstract (in Japanese) (See Japanese page) 
(in English) Performance of an anechoic chamber is assured on the frequency region above 30MHz, but it is unclear on the frequency region below 30MHz. However, in a photovoltaic generation system and a power line communication system, the performance of the anechoic chamber on the frequency region below 30MHz is needed. Therefore, we try to measure the magnetic field property of the anechoic chamber on the frequency region from 150kHz to 30MHz. We also try to calculate the magnetic field property of free space on the ground plane, which has not wall and ceiling such as the anechoic chamber. By comparing with measurement values of magnetic field on the large anechoic chamber (JET: 10m method) and calculation ones by the method of moment (NEC2) on free space on the ground plane in the frequency region from 150kHz to 30MHz, vectorial sum of magnetic field at 3m agreed each other within 3.3dB and that at 10m agreed each other within 4.4dB. Therefore, we can clear to be able to measure magnetic field property in the frequency region from 150kHz to 30MHz, without considering magnetic reflection from wall and ceiling of anechoic chamber.
Keyword (in Japanese) (See Japanese page) 
(in English) Electromagnetic anechoic chamber / Magnetic field measurement / loop antenna / Method of moment / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 18, EMCJ2011-3, pp. 13-18, April 2011.
Paper # EMCJ2011-3 
Date of Issue 2011-04-15 (EMCJ) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 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 2011-04-22 - 2011-04-22 
Place (in Japanese) (See Japanese page) 
Place (in English) University of Hyogo 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Countermeasure, EMC, etc. 
Paper Information
Registration To EMCJ 
Conference Code 2011-04-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Applicability of an anechoic chamber as test site below 30MHz 
Sub Title (in English)  
Keyword(1) Electromagnetic anechoic chamber  
Keyword(2) Magnetic field measurement  
Keyword(3) loop antenna  
Keyword(4) Method of moment  
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Keyword(6)  
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1st Author's Name Masamitsu Tokuda  
1st Author's Affiliation The University of Tokyo (Univ. of Tokyo)
2nd Author's Name Hiroyuki Ohsaki  
2nd Author's Affiliation The University of Tokyo (Univ. of Tokyo)
3rd Author's Name Hiroharu Yamashita  
3rd Author's Affiliation Japan Electrical Safety & Environment Technology Laboratories (JET)
4th Author's Name Masahiro Inoue  
4th Author's Affiliation Japan Electrical Safety & Environment Technology Laboratories (JET)
5th Author's Name Mariko Tomisawa  
5th Author's Affiliation Tokyo City University (TCU)
6th Author's Name Ryosuke Hasegawa  
6th Author's Affiliation Tokyo City University (TCU)
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Speaker Author-1 
Date Time 2011-04-22 13:55:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2011-3 
Volume (vol) vol.111 
Number (no) no.18 
Page pp.13-18 
#Pages 6 
Date of Issue 2011-04-15 (EMCJ) 

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