Presentation 1996/6/25
International Trend and Technical Problems on EMC to Vehicles [1] : Fundamental Defects or CISPR 12 Recommendation and Solutions Proposed
Shigekazu SHIBUYA, Akinori KAMESHIMA, Haruo ISHIZUKA, Juiti KAKU, Koujirou UNNO,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Although the test distance in the EMC measurement under the latest recommendation is ten (10) m, the CISPR's Durban Conference (December 1995) have reached an agreement to accept an optional use of the measurement distance of 3 m because the correlation coefficient of 10 dB may be insured referring to actual data, i.e., 5-10 dB obtained in Germany, Japan and so on, and it has been decided that such agreement be included in the fourth version (Autumn, 1996) of CISPR 12. Such decision, however, is very problematic. The correlation coefficient may take -5 to +30 dB depending on polarization, frequency and type of road surface. Therefore, if it is assumed as 10 dB for all cases, occurrence of a larger error in the measurement may be inevitable. The main concern in the method of measurement by the recommendation was at the ignition noise, consequently it can hardly be applicable to the so-called high-tech car or electric car which equips with recently developed electronic control devices, navigator and soon. In other words, acceptance and its subsequent standardization of the revised recommendation seem to be very risky in view of international non-tariff barrier or product liability. This paper points out such technical defects gives proof and proposes a solution.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) vehicle / EMC / test site / correlation factor / disturbance limit / freespace
Paper # EMCJ96-16
Date of Issue

Conference Information
Committee EMCJ
Conference Date 1996/6/25(1days)
Place (in Japanese) (See Japanese page)
Place (in English)
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Paper Information
Registration To Electromagnetic Compatibility (EMCJ)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) International Trend and Technical Problems on EMC to Vehicles [1] : Fundamental Defects or CISPR 12 Recommendation and Solutions Proposed
Sub Title (in English)
Keyword(1) vehicle
Keyword(2) EMC
Keyword(3) test site
Keyword(4) correlation factor
Keyword(5) disturbance limit
Keyword(6) freespace
1st Author's Name Shigekazu SHIBUYA
1st Author's Affiliation System Consultant SHIBUYA's Office()
2nd Author's Name Akinori KAMESHIMA
2nd Author's Affiliation KAMESHlMA Consultant Office
3rd Author's Name Haruo ISHIZUKA
3rd Author's Affiliation ISHIZUKA Radio Engineering Consultant Office
4th Author's Name Juiti KAKU
4th Author's Affiliation Colory Co., Ltd.
5th Author's Name Koujirou UNNO
5th Author's Affiliation Colory Co., Ltd.
Date 1996/6/25
Paper # EMCJ96-16
Volume (vol) vol.96
Number (no) 135
Page pp.pp.-
#Pages 8
Date of Issue