Hi All, I have just posted the third in a four part series of Technical Tidbits on shielded/unshielded loops. This article shows that for some uses, unshielded loops have less parasitic E-field coupling than shielded ones. In particular the unshielded loops appear better when used right up against a circuit board to inject signals and my extension to sense them as well.
The Square Shielded Loop - Part 3, Parasitic Coupling Between Unshielded Wire Loops (July 2008 Technical Tidbit) Abstract: Unshielded wire loops are inexpensive and easy to build. However, capacitive (E field) coupling has always been a concern when using these simple loops. Coupling between unshielded wire loops is investigated, included parasitic capacitive coupling. Performance is compared to shielded loops and the simple unshielded wire loop is shown to be superior in some cases to shielded loops. The link to the article is the picture of the experimental setup at the bottom of the page at: http://emcesd.com Enjoy, 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: [email protected] \ _ / ] \ _ / 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 [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
