The equivalent source modeling of electromagnetic interference coupling on the cable

This paper proposed an equivalent source modeling method of the external complex electromagnetic interference (EMI) coupling on a cable connected to the electronic devices shielded by a chassis. The Norton theorem is used to develop the equivalent circuit of the EMI source. The moment method (MOM) in FEKO is used to calculate the short current and port impedance in Norton equivalent circuit, and curve fitting is used in ADS to obtain the exact parameters in the circuit. Finally this equivalent circuit could characterize the influence that the external EMI has on the electronic devices. This method can solve the problem that how to model the multi-interference source in a near-field strong coupling and miniature-size space, and can be used in the conducted susceptibility analysis of coupling coupler injection and probe injection.

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