Thanks for all the inputs so far. I have confirmed with the vendor of the metal fabric that they do not recommend it for removable use, due to long-term reliability. Therefore the only option that might work seems to be using solid metal panels.
I am thinking the same way at the moment, folding metal panels (piano hinges?) and some way to ensure contacts at the perimeter. Still work in progress.... Neven From: "Bob Richards" <[email protected]> To: [email protected] Sent: Friday, April 30, 2010 1:29:59 PM GMT -08:00 US/Canada Pacific Subject: Re: conductive cloth or plate over ferrite floor-patch question I've seen one large 10m chamber with folding metal panels in the floor, with ferrite tile underneath. There were copper fingers around the perimeter to ensure contact with the metal when closed. Not sure how it performed over time, however. Bob Richards, NCT --- On Fri, 4/30/10, [email protected] <[email protected]> wrote: From: [email protected] <[email protected]> Subject: conductive cloth or plate over ferrite floor-patch question To: [email protected] Date: Friday, April 30, 2010, 2:34 PM Dear EMC-PSTC-ers, Has anyone used semi-anechoic chambers with permanently installed ferrite tiles in the floor between the antenna and the DUT for radiated-immunity and with a (re)movable conductive cover for the emission tests. I would love to make it work if possible, because it would make it so much easier to move and store the thin sheet metal or wire-mesh than moving the ferrite panels in and out for the immunity tests. Perhaps Laird Flectron copper-cloth might work, http://www.lairdtech.com/Products/EMI-Solutions/Specialty-EMI-Solutions/Metallized-Fabric/ <http://www.lairdtech.com/Products/EMI-Solutions/Specialty-EMI-Solutions/Metallized-Fabric/> We can have ferrites installed in a compact semi-anechoic chamber (3m test distance) flush with the rest of the GND-plane/floor, but I am not sure if there is a good way to put a sheet of metal (or a copper wire mesh/cloth) over it, overlap and make a reliable contact with the GND plane around the perimeter of the ferrites. Perhaps with an overlap of at least 6” (15cm) with the rest of the GND-plane, using a bunch of magnets around the perimeter to tie it to the GND plane. Long-term reliability is also my consideration. I appreciate if you have any experience you are willing to share. Thanks, Neven - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
