U.S. distributor, Saelig Electronics, recently announced a new line of three open-style TEM (Transverse ElectroMagnetic) cells from Tekbox Digital Technologies.
TEM cells may be used for either radiated emissions and radiated immunity testing of small circuit boards or electronic products. All three models come with a 50 Ohm, 25 watt load and DC block. All have open sides for ease in placing an EUT for testing.
A TEM cell is a stripline device for radiated emissions and immunity testing of electronic devices. It is not a replacement, but due to its size and cost it is a convenient alternative to measurements in an anechoic chamber. A TEM cell consists of a septum, the conductive strip in the center section and walls which are connected to ground. The geometry is designed to present a 50Ω stripline. The device under test (DUT) is placed between the bottom wall and the septum.
Combined with a spectrum analyzer or signal generator, products can now be tested before and after EMC-related design modifications. A set-up with a TEM cell will not deliver exactly the same quantitative results as a measurement in a certified test house, but it will give indication of whether the design suffers from excessive radiated noise or not.
