Determination of the higher order mode occurrence in a TEM and GTEM-cell using self developed computer program

TEM-cell and GTEM-cell that are used in EMC/EMI have been made at the Faculty of Electrical Engineering and Computing, Zagreb. They were analyzed and tested using numerical methods. Theoretical background for the higher order mode behavior has been given. Software for calculating the cut-off and resonant frequencies of the higher order modes was developed. The results of the analysis and calculation were given and discussed.