DIY Open-Sided TEM Cell for EMC Testing?

[coflynn]

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
Atmel article on TEM cell - fairly large
Paper on DIY TEM cell - medium size

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

[T3sl4co1l]

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

[wemme]

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?

[acbern]

would agree, should be closed. am interested as well, so anybody who has done that and wishes to share info would really be appreciated.

[wemme]

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.

[asiannerd]

We use a commercial open TEM Cell in our lab: 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:

[Smokey]

Anyone end up making one of these?

[nctnico]

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...