Stephanie, You can get a lot of good information about construction out of the original Crawford papers, e.g., M. L. Crawford, "Generation of Standard EM Fields using TEM Transmission Cell." IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, Vol. EMC-16, No. 4, 1974, pp. 189-195.
There were sessions on TEM and GTEM cells at the IEEE EMC conference in Santa Clara this year. You might check the conference proceedings, pp. 40-62. The SAE has also published an "Information Report" titled, "Electromagnetic Susceptibility Measurements of Vehicle Components using TEM Cells (14 kHz-200MHz)--SAE J1448 Jan84." The title makes it sound as if the report is specific to the automobile industry, but there is a readable discussion of the theory and a very practical presentation of how to build a cell. Dimensions and drawings are given. I encountered it at an SAE Toptec a year ago, and it's among the best general discussions I've found. As for the antenna you need, the only practical solution would be a log periodic yagi, and it would have to be huge to cover that range. I don't think there is anything out there that you can beg, borrow, or steal. The solution is going to involve using a number of antennas, from rods and long wires to yagis and horns. See EMCO for the probes. They're also easy to make, using loops on the ends of coax, fountain pen bodies, split ferrites, etc. There are lots of papers out there on field probe design. But experiment...they're easy to make. Good luck, Brad --------------------------------- > > Hi, > > I would like to know if you have some information on "How to make a Tem > Cell". Are there some books that I can consult?? > > I am looking for a good set off passive probs. The criteria that I am > looking for are cost effectiveness and flexibility. > > Finally, I am looking for a broad band antenna, that will cover from 10 Mhz > to 2 Ghz, any suggestions. > > Many thanks for your help > > Stephane Marcouiller > EMC Lab. > Teknor Industrial Computers > [email protected] > > ----------------------------------------------------------------------- Brad Rehm, Compliance Engineer PHONE: 512-244-3371 Professional Testing (EMI), Inc. FAX: 512-244-1846 Round Rock, Texas 78681 Compatibility Products Corp. PHONE: 512-388-0969 Round Rock, Texas 78681 [email protected] http://www.ptitest.com -----------------------------------------------------------------------
