Abstract: The field distribution in the GTEM Cell(1GHz transverse electromagnetic transmission Cell) is discussed. The field distribution in the GTEM Cell is theoretically computed by the 3D FDTD method and is experimentally measured. The process for calculating field distribution in the GTEM Cell by the 3D FDTD means with a number of problems is introduced in detail. Theoretical results agree well with experimental data. It is proved that the variations of the field in the effective region of a GTEM Cell are less than 4dB, which can satisfy the requirements for the measurement of electromagnetic compatibility.

Key words: GTEM Cell(GHz transverse electromagnetic transmission cell), three dimensional FDTD-method, distribution of electro magnetic field