Doug, Thanks for the link to this fine paper. I like to use NEC simulation to model CM current/radiation. I have found that this works even for CM current excited on large structures such as semiconductor tester boards. Something as seemingly innocent as placing an oscilloscope probe on a signal node can induce enough CM current to couple a signal into other probes on the test board.
Dave Cuthbert Micron Technology, Inc. From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Doug Smith Sent: Friday, March 03, 2006 12:13 AM To: emc-pstc Subject: Predicting Cable Emissions from Common Mode Current It's that time of the month again and I have posted my latest Technical Tidbit on predicting cable emissions. After an introduction to common mode current measurements, a pdf paper by Mat Aschenberg and Charles Grasso is presented. Abstract: Common mode current measurements are widely used to predict emissions from equipment cables. Mat Aschenberg and Charles Grasso have written an analysis relating common mode current measurements to radiation comparing three different methods. Their treatment is unique in that it addresses the case where the cable is longer than one half wavelength. The results are presented as a pdf file. The link to the article is the picture of the experimental test setup at the bottom of the home page at http://emcesd.com . If any of you want to publish a short paper this way, through my Technical Tidbits, send me an email. I have 14 shows posted at http://emcesd-podcast.com now with several more coming shortly. New shows are posted every week. Doug -- ___ _ Doug Smith \ / ) P.O. Box 1457 ========= Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----( ) | o | Email: d...@dsmith.org \ _ / ] \ _ / Website: http://www.dsmith.org - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
