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Paper Abstract and Keywords
Presentation 2012-03-02 15:45
Study on Measurement Method for Near Electric Field Noise from LED Lamp Bulbs
Takumi Ohashi, Syohei Yamada, Takashi Kasuga (NNCT), Hiroshi Inoue (Akita Univ.) EMD2011-137 Link to ES Tech. Rep. Archives: EMD2011-137
Abstract (in Japanese) (See Japanese page) 
(in English) Although the inverter circuit is used to make high efficiency of LED bulbs, the large electromagnetic noise radiated from the inverter circuit may influence to the radio communication system. Previously, measurement method of near magnetic field has been used to identify noise source. However, though near magnetic field noise from LED bulbs was not detected, near electric field was detected. In the past, we have measured near electric field noise by using bowtie antenna, which does not have calibration factor and it cannot be measured quantitatively. The purpose of this study is to propose the measurement method of near electric field noise from LED bulbs by using monopole antenna. The calibration factor is obtained by a near field 3-Antenna method. Alternatively, using two different length antennas(50~mm and 300~mm), 1 to 400~MHz wideband measurement can be possible to use. Actually, characteristic near electric field is observed from 100 to 200 MHz. This result conformed to far electric field from LED bulbs, and it has correlate with near electric field.
Keyword (in Japanese) (See Japanese page) 
(in English) LED bulbs / near electric field noise / monopole antenna / a near field 3-Antenna method / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 460, EMD2011-137, pp. 45-48, March 2012.
Paper # EMD2011-137 
Date of Issue 2012-02-24 (EMD) 
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)
Download PDF EMD2011-137 Link to ES Tech. Rep. Archives: EMD2011-137

Conference Information
Committee EMD  
Conference Date 2012-03-02 - 2012-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Tanagawa Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2012-03-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Measurement Method for Near Electric Field Noise from LED Lamp Bulbs 
Sub Title (in English)  
Keyword(1) LED bulbs  
Keyword(2) near electric field noise  
Keyword(3) monopole antenna  
Keyword(4) a near field 3-Antenna method  
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1st Author's Name Takumi Ohashi  
1st Author's Affiliation Nagano National College of Technology (NNCT)
2nd Author's Name Syohei Yamada  
2nd Author's Affiliation Nagano National College of Technology (NNCT)
3rd Author's Name Takashi Kasuga  
3rd Author's Affiliation Nagano National College of Technology (NNCT)
4th Author's Name Hiroshi Inoue  
4th Author's Affiliation Akita University (Akita Univ.)
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Speaker Author-1 
Date Time 2012-03-02 15:45:00 
Presentation Time 15 minutes 
Registration for EMD 
Paper # EMD2011-137 
Volume (vol) vol.111 
Number (no) no.460 
Page pp.45-48 
#Pages
Date of Issue 2012-02-24 (EMD) 


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