Numerical Simulation of a Direct Current Mode Stirred Reverberation Chamber

Abstract

The Direct Current Mode Stirred method (DCMS) is a new method which combines the advantages of Direct Current Injection (DCI) on surfaces of test objects and the advantages of a Reverberation Chamber (RC). The idea of this combination is motivated by the growing requirements of high field level susceptibility testing and the resulting significant costs. The RC already fulfils this efficiency requirement and needs quite low power to generate high field levels, but is always limited in the lowest usable frequency, which ranges typically at some hundred Megahertz. In contrast to this, the DCI (or HLDD, High level Direct Drive) technique works very effectively in the low frequency range, but is limited at higher frequencies to some hundred Megahertz. A combination thereof allows the extension of the useful frequency range from kilohertz to gigahertz and is therefore usable for EMC qualification without frequency limitation.This paper outlines the numerical simulation approach for the DCMS-System and shows the numerical models which were used. It compares the results which were gained by the numerical simulations and compares this to already available measurement data. Results with an acceptable level of uncertainty have been gained but improvements for the numerical model are foreseen in future work.