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Paper Abstract and Keywords
Presentation 2019-11-15 16:15
Fundamental study on optimizing measurement location of electric field strength distribution by sampling theorem
Masataka Midori, Tomohiro Honya, Hiroshi Kurihara (TDK) EMCJ2019-74
Abstract (in Japanese) (See Japanese page) 
(in English) Radiated emissions from electric devices are generally evaluated at a position where the maximum value is obtained in the electric field strength distribution. In order to determine the position where the maximum value is obtained in the electric field strength distribution, the measurement times for a standard radiated emission test are very long. We have studied a high-speed EMI measurement system using sampling frequency conversion as a measurement system that reduces the measurement time yet still maintains accuracy , and reported that the measurement intervals can be reduced to half-wavelength. In this study, in order to further reduce the number of measurement points, we did fundamental study on the optimization of the measurement position based on the sampling theorem. First, the electric field strength distribution measurement position according to the sampling theorem was formulated. Next, in order to feasibility study, the electric field strength distribution radiated from the double rigid horn antenna was measured. We could confirmed that the number of measurement points by the proposed method was greatly reduced to about 5.3% of the half-wavelength interval, and the deviation of the maximum electric field strength between the proposed method and the manual measurement was within +0.02 / -0.16 dB.
Keyword (in Japanese) (See Japanese page) 
(in English) Sampling frequency conversion / Upsampling / Sampling theorem / Plane Wave Spectrum / EMI Measurement / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 293, EMCJ2019-74, pp. 17-22, Nov. 2019.
Paper # EMCJ2019-74 
Date of Issue 2019-11-08 (EMCJ) 
ISSN Online edition: ISSN 2432-6380
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 IEE-SPC  
Conference Date 2019-11-15 - 2019-11-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMCJ 
Conference Code 2019-11-EMCJ-SPC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fundamental study on optimizing measurement location of electric field strength distribution by sampling theorem 
Sub Title (in English)  
Keyword(1) Sampling frequency conversion  
Keyword(2) Upsampling  
Keyword(3) Sampling theorem  
Keyword(4) Plane Wave Spectrum  
Keyword(5) EMI Measurement  
1st Author's Name Masataka Midori  
1st Author's Affiliation TDK Corporation (TDK)
2nd Author's Name Tomohiro Honya  
2nd Author's Affiliation TDK Corporation (TDK)
3rd Author's Name Hiroshi Kurihara  
3rd Author's Affiliation TDK Corporation (TDK)
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Speaker Author-1 
Date Time 2019-11-15 16:15:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2019-74 
Volume (vol) vol.119 
Number (no) no.293 
Page pp.17-22 
Date of Issue 2019-11-08 (EMCJ) 

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