GTEM cells are a testing site for effective radiation immunity and emission testing in a single, controlled and protected environment.Compared with other test sites, GTEM test has higher accuracy and better reproducibility. In principle, the GTEM chamber is coaxial extension of the pyramid with an impedance of 50.At its end, the line terminates the combination of the above impedance matched by the termination resistor and the rf absorber design and construction. The GTEM 750 has a maximum spacing of 750mm and is suitable for radiation and immunity testing. Emissions and immunity tests in a single, shielded environment Meet basic standards: IEC/EN 61000-4-20 IEC and CISPR 14-1,61000-6-3 IEC 61000-6-4 are EUTs connection-free cables Standard: EN 60118-13 immunization tests Ideal design qualification and pre-certification The generated fields are largely homogeneous and simple to compute Efficient power conversion requires smaller power amplifiers Excellent standing wave ratios do not require measurement of reflected power over the entire frequency range