EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: coflynn on March 07, 2015, 10:32:03 pm
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Hello,
I wondered if anyone had designed/built their own open-sided TEM cell for basic EMC testing, or otherwise used one? Basically appears to be a few pieces of PCB of appropriate dimensions to form the cell.
As a reference here is a few examples of what I'm talking about:
Commercial small TEM cell - $599, see manual for details (http://tekbox.net/test-equipment/tbtc1-tem-cell)
Atmel article on TEM cell - fairly large (http://www.atmel.com/Images/Article_AC10_Open-TEM-Cells.pdf)
Paper on DIY TEM cell - medium size (http://www.ewh.ieee.org/soc/emcs/acstrial/newsletters/summer08/pp2.pdf)
I was looking at making PCB design that could just be sent to fab, but wondered if someone else had done that? The $600 TEM cell isn't a terrible deal compared to the cost of large PCBs, but it's also maybe a little small for my use.
Regards,
-Colin
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One of these days I'm going to do something like that. But why use PCB? I was thinking cardboard, aluminum foil and tape!
Tim
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I would like to build a closed tem cell for emc radiated and susceptibility testing. I always thought a open tem cell was some what compromised I.e spewing out e fields and picking up back ground noise. Any one have any experience with these?
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would agree, should be closed. am interested as well, so anybody who has done that and wishes to share info would really be appreciated.
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I Have collected a number of papers including research on the topic however i have not had any time to review or do anything about it as i am seriously tied up with work.
PM me if you are interested in a copy of what i have collected.
Regards
Bart
would agree, should be closed. am interested as well, so anybody who has done that and wishes to share info would really be appreciated.
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We use a commercial open TEM Cell in our lab: http://www.frankoniagroup.com/downloads/EMC_Test_Equipment/tem_cells_open.pdf?PHPSESSID=49625481387bf6978cd99bacc3d6237d (http://www.frankoniagroup.com/downloads/EMC_Test_Equipment/tem_cells_open.pdf?PHPSESSID=49625481387bf6978cd99bacc3d6237d) , though not really low cost. Advantage is that we can monitor displays and LEDs during testing easily.
External noise can be easily identified by powering on/off the DUT
Here a youtube video from the chip whisperer using an open TEM Cell: https://www.youtube.com/watch?v=J_6JA94pE-Y (https://www.youtube.com/watch?v=J_6JA94pE-Y)
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Anyone end up making one of these?
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Anyone end up making one of these?
Yes. I have designed and build a fully closed TEM cell. But I didn't got to finishing the text yet and the Excel sheet I created to calculate all the sizes needs some tweaking as well. I'm planning to do a very longwinded post about the entire project. Likely I'll need several postings to fit all the text...