In principle, the GTEM chamber is a coaxial extension of the pyramid with an impedance of 50ohms.At its end, the line terminates the combination of the above impedance matched by the termination resistor and the rf absorber design and construction.

Teseq GTEM250A-SAE with improved test range over 1GHz for excellent standing wave ratio GTEM chamber.
Emission measurement
SAEJ1752/3 and IEC61967-2 define a method to measure the electromagnetic radiation from the standard IC (integrated circuit) at a frequency range of 150 KHZ to 1GHz. The IC itself is mounted on a shielded test plate, clamped to a special hole at the top of the TEM cell.With the exception of the integrated circuit, all interface wiring and other necessary components are placed on the outside of the test board as part of the battery wall.The spectrum analyzer measures the rf radiation from the receiver connected to the GTEM measure from the integrated circuit.
Immunity test
The test panel can also be used in the GTEM chamber for the immunity test of integrated circuits.IEC standard 62132-2 specifies test methods for immunity of integrated circuits in the frequency range of 150 KHZ to 1GHz.
GTEM250a - the sae