Alternative radiated susceptibility test methods at unit level

This article briefly illustrates and discusses the possibility to develop alternative, simplified test methods for radiated susceptibility testing at unit level for the aerospace sector. The rationale here discussed, and the alternative test methods here illustrated, are targeted to the development of a testing approach with deeper physics' sense, quicker and less expensive in order to help the industrial design process of equipment for spacecraft. The theoretical basis of this analysis is the possibility to enforce equivalence (in terms of common mode current) among the effects due to field-to-wire-coupling, bulk current injection and crosstalk, under suitable assumptions. Two dual approaches are considered, one aimed at achieving deterministic equivalence, the other enforcing equivalence in statistical terms. Pros and cons of the proposed alternative test methods are discussed by illustrating the outcomes of ad hoc setups and a wide experimental campaign.