A good practice guide for the use of GTEM cells in EMC measurements according to IEC61000-4-20

The standard IEC 610004-20 includes the GTEM cell as a measurement facility for EMC emission and immunity testing. Frequencies above 1 GHz are increasingly required for EMC measurements. This paper describes measurements performed to investigate the upper frequency limits for the use of GTEM cells, and presents some results of the research to produce a measurement good practice guide, giving guidance on how to perform EMC measurements according to IEC 61000-4-20, with acceptable uncertainties.