Long-Line Crosstalk Injection Approach for Equivalent Reproducing Pulsed Electromagnetic Field Coupling to Wiring Harness Effects

In this article, we propose a nonintrusive pulsed radiated susceptibility testing approach based on the long-line crosstalk setup. The objective is to reproduce the pulsed electromagnetic field coupling effect for wiring harness systems. The proposed test setup explores the crosstalk between parallel wires and imposes an additional pulse-driven wire to couple the interferences onto the wire under test. The transmission line model is exploited to represent both crosstalk and the pulsed field coupling process, demonstrating that equivalence can be achieved within a limited clearance time in general, provided the driven wire exceeds a critical length. In addition, rigorous equivalence can be obtained for particular incidences, such as broad-side illumination and end-fire excitation, under the condition of matched auxiliary equivalent terminals. Comparing this to state-of-the-art pulse injection approaches, the crosstalk-based testing method ensures the exact reproduction of field coupling effects without necessitating driven pulse predistortion, this characteristic underscores its robustness for pre-compliance pulsed field radiated susceptibility testing. Additionally, by considering a canonical double exponential interference, a pilot experiment is conducted to verify the equivalent rationale and feasibility of the proposed approach.