Ken Javor wrote >> I didn't know what the 20 H rule was either, just assumed everyone else did... <<
See http://www.qsl.net/wb6tpu/si-list4/0391.html page 9 of http://www.ansoft.com/thewave/Shielding_and_Decoupling.pdf http://factaee.elfak.ni.ac.yu/fu2k12/fu04.html and others (search on "20H rule.") RF between two equally sized planes does radiate from the slot formed at the edge - but RF on a small plane over a larger one also radiates from the slot around the smaller. We don't want to put patch antennas on a board while trying to avoid other problems. Thus the controversy. Cortland KA5S - 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/listserv/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
