Investigation of the Workbench Faraday Cage Method, IEC 61967-5

The Workbench Faraday Cage Method (WBFC), IEC 61967 Part 5, is a method to estimate common mode current radiated emission caused by integrated circuits either applied on a standardized test-board or on a final printed circuit board. The presented work analyzes the method with the help of simulations of a simple microstrip board with two attached cables connected to ground. The analysis shows that the theoretical foundation of the method is weak and that the WBFC method gives a poor prediction of the radiated emission.