Hi John and the group, How the shielding effectiveness is measured determines the value one gets. If you are trying to shield one part of a board from another, for instance in a mobile phone, the plane wave numbers that are published are not very useful for such near field conditions.
For cases such as this, I have published a very simple way to measure shielding effectiveness for close in shielding of magnetic fields. The link to my website article is: http://emcesd.com/tt080100.htm This is not a new idea, just an easy way to implement an old one. Separately, on July 14 I am giving a workshop at the University of California Santa Barbara titled "Workshop on Failure Analysis and Prevention in Electronic Circuits." All proceeds are going to benefit the University. The information on registration will be posted on the UCSB site soon. My site http://emcesd.com will link to that page. Just go to the picture of palm trees on my site. Doug John Kretsch wrote: > This topic has come up regarding painting the inside of a plastic > housing with something like Electrodag550 > > > > http://www.achesonindustries.com/doc/pds/Electrodag550.pdf > > > > It claims 60 dB (frequency range is not specified) with a 0.002 minimum > application thickness. > > > > Does anyone have any experience with this? Any long term durability issues? > > > > Regards, > > > > John R. Kretsch, P.E., NCE > > Principal > > Interpro Consulting Engineering, LLC > > (860) 919-2980 > > http://www.ip-ce.com > > > > > > - ---------------------------------------------------------------- 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 [email protected] > > 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 [email protected] Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > -- ___ _ 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: [email protected] \ _ / ] \ _ / Web: 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 [email protected] 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 [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
