GTEM-, TEM- Cells, Stripline

A GTEM (Gigahertz Transverse Electro Magnetic) cell is a test site for efficiently performing
both radiated immunity and emissions testing in a single, controllable and shielded environment.
Compared to other test sites, GTEM testing is faster with high accuracy and excellent
■■ Meets basic standard: IEC/EN 61000-4-20
■■ Meets standards for emissions testing: CISPR 14-1, IEC 61000-6-3 and IEC 61000-6-4
for EUTs without connected cables
■■ Meets standards for immunity testing: EN 60118-13
■■ Ideal for design qualification and pre-certification
■■ Fields generated are largely homogeneous and simple to calculate
■■ Efficient power conversion requires smaller power amplifier
■■ Excellent VSWR over the entire frequency range – no need for measurement of
reflected power
GTEM stands for Gigahertz Transverse Electro Magnetic. This special type of cell has the
advantage of having no cut-off frequency as do other types of TEM waveguides.
In principle, the GTEM cell is a coaxial line expanding pyramidally and having an impedance of
50 Ω. At its end, the line is terminated by a combination of termination resistors and RF absorbers
designed and constructed to match the above mentioned impedance.



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