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Paper Abstract and Keywords
Presentation 2009-03-13 11:00
Loophole in the Measurement of Conducted Emission from Broadband Power-Line Communications using Impedance Stabilization Network
Masahiro Kitagawa (Osaka Univ.) EMCJ2008-115
Abstract (in Japanese) (See Japanese page) 
(in English) The radiated emission due to the in-house broadband power-line communications (PLC) is caused by the common-mode (CM) currents on the power-line network.
There are two origins of the CM currents; The one is caused by the unbalance of the PLC modem itself and injected from the modem to the outlet. The other is converted from the DM signal current at the unbalanced elements on the power-line network. Japanese PLC regulation ristricts the CM current measured using the impedance stabilization network (ISN) with the DM impedance of 100 ohm, CM impedance of 25 ohm, and the longitudinal conversion loss (LCL) of 16dB, which is determined from the LCL measured at the outlets and intended to emulate the in-house power-linen network. However, the PLC modems which are type-approved under the regulation and avaiable in the market cause the radiated emission more than 20dB larger than intended. The direct cause of the excessive emission is the excessive DM signal of the PLC modems. Why the CM current measurement using the ISN allows the excessive DM signal is clarified.
[Typographical corrections]
There are two Figures 5. The second Fig.5 on p.10 should be renumbered as
Fig.6a. Accordingly, the second line of the section 2.1 should refer to Fig.6a.
The third line of the last paragraph of the section 2 on p.11 should mention $-\Gamma$ instead of $\Gamma$.
In Eq.(16), $\delta$ must be replaced with $|\delta|$.
Keyword (in Japanese) (See Japanese page) 
(in English) Power-line communications (PLC) / conducted emission / common mode / differential mode / unbalance / mode conversion / longitudinal conversion loss (LCL) / impedance stabilization network (ISN)  
Reference Info. IEICE Tech. Rep., vol. 108, no. 482, EMCJ2008-115, pp. 7-12, March 2009.
Paper # EMCJ2008-115 
Date of Issue 2009-03-06 (EMCJ) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
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)
Download PDF EMCJ2008-115

Conference Information
Committee EMCJ ITE-BCT  
Conference Date 2009-03-13 - 2009-03-13 
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 2009-03-EMCJ-BCT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Loophole in the Measurement of Conducted Emission from Broadband Power-Line Communications using Impedance Stabilization Network 
Sub Title (in English)  
Keyword(1) Power-line communications (PLC)  
Keyword(2) conducted emission  
Keyword(3) common mode  
Keyword(4) differential mode  
Keyword(5) unbalance  
Keyword(6) mode conversion  
Keyword(7) longitudinal conversion loss (LCL)  
Keyword(8) impedance stabilization network (ISN)  
1st Author's Name Masahiro Kitagawa  
1st Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2009-03-13 11:00:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2008-115 
Volume (vol) vol.108 
Number (no) no.482 
Page pp.7-12 
#Pages 6 
Date of Issue 2009-03-06 (EMCJ) 

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