Title:
電子回路基板のコモンモード・インピーダンス測定方法及びその測定装置
Document Type and Number:
Japanese Patent JP4066478
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method and device for measuring common mode impedance for evaluating the common mode noise of an electronic circuit board. SOLUTION: A metal tool 3 consists of a tool body 4 whose one surface is open and that is in nearly box shape and a lid body 5 for blocking the opening of a tool body 4. And, an electronic circuit board 1 is placed on a dielectric block 2 being arranged in the tool 3. At least one portion of an area between input/output terminals of the electronic circuit board 1 is short-circuited, and the short-circuited input/output terminal is connected to a feed through type N-type coaxial connector 7 being provided on the side surface of the tool 3. Circuit constant measuring equipment 20 is connected to the feed through type N-type coaxial connector 7 via a coaxial cable 9 and an N-type coaxial connector 8. The circuit constant measuring equipment 20 applies a signal to the electronic circuit board 1 and measures its reflection factor, thus measuring common mode impedance for ground 30 of the electronic circuit board 1.
Inventors:
Takashi Sasabe
Application Number:
JP29519297A
Publication Date:
March 26, 2008
Filing Date:
October 28, 1997
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
G01R27/02; G01R27/06; G01R31/00; G01R31/30
Domestic Patent References:
| JP63131073A | ||||
| JP3033020Y2 | ||||
| JP4020126A | ||||
| JP4093667A | ||||
| JP5312859A | ||||
| JP6215646A | ||||
| JP7302278A | ||||
| JP9036817A |
Foreign References:
| US5315257 | ||||
| US5534772 |
Other References:
M. J. Coenen,EMC workbench: testing methodology, module level testing and standardization,Philips Journal of Research,1994年,Vol. 48,pp. 83-116,ISSN 0165-5817
Attorney, Agent or Firm:
Keisei Nishikawa
Atsuo Mori
Atsuo Mori