Assessment of the Bulk Current Injection test procedure based on the substitution method

In this work, the Bulk Current Injection (BCI) test procedure based on the substitution method is simulated with the objective to quantify the differences between the RF current level theoretically and actually injected into the equipment under test (EUT). Standard injection profiles are considered, and a virtual procedure for calibration is exploited to retrieve the forward power required for the test. It is shown that the difference between expected and actually injected RF current levels is significantly influenced by both EUT (input impedance and balancing) and setup characteristics (e.g., length of the cable harness). Additionally, comparison of theoretical power levels with those measured during real calibration of the injection device allowed for excluding the occurrence of non-linear effects due to probe saturation.