Experimental Proof of Concept for the Correlation of Bulk Current Injection and Radiated Susceptibility Tests for Aerospace Equipment up to 1 GHz

This work presents the results of an experimental campaign aimed at validating a recently developed alternative radiated susceptibility (RS) procedure based on the use of bulk current injection (BCI). The rationale of such a procedure consists in the injection of common-mode (CM) conducted disturbances in a certain excess over RS, which is quantified by an engineering margin called overtesting (OT). From the standpoint of the test operator, owing to lack of knowledge about the frequency response of the CM impedance of terminal equipment, OT results to be a random variable. However, its statistics was shown to be predictable through theoretical analysis based on circuit modeling. Unlike previous works, where experimental validations relied on simple cables and basic terminal units, a realistic test setup mimicking typical aerospace harness and equipment is here exploited. An extensive test campaign was carried out to collect data sets for the estimation of the cumulative distribution function of OT. Results corroborate the validity of the proposed approach up to 1 GHz.