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Anyone knows any TEM Cell manual? - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Anyone knows any TEM Cell manual?
Posted: Sun Aug 21, 2005 8:56 am 
 
Lieutenant

Joined: Sun Aug 21, 2005 8:47 am
Posts: 2
Good day people.

I'm currently doing an undergraduate project on EMC. I'm supposed to build a simple TEM Cell for the measurement of radiated emission from IC. Anyone knows where to find a TEM Cell manual or specification or something that may help? I try the web but couldnt find any. Hope anyone can help me out.

Great thanks!

Cheers,
teokun


 
   
 
 
 Post subject:
Posted: Fri Aug 26, 2005 3:17 pm 
Teokun,

It is quite simple.

1. The TEM cell is a coaxial cable. The physical relationship for a 50 Ohm coax cable (in air) should be maintained all throughout the expansion (RF input) sector, the continous sector and the terminating sector (The one where there is supposed to be a dummy load).

2. The maximum operating frequency is proportional to one quarter wavelength between the center conductor and the metal cabinet.

3. The field strength is (for practical terms) U = SQRT (P * R) [R=50] If used for Radiated Immunity tests.

(Provided that the device under test is smaller than the width of the flat center conductor and that it is placed 1/2 distance between the ground and the center conductor.

Using white plastic foam is recommended for DUT support.





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