Electromagnetic Coupling Analysis Method for Aircraft Based on Electromagnetic Topology

High intensity radiated field (HIRF) significantly impact aircraft flight safety, and currently a lack of necessary technical means for HIRF protection design in the early development stages of aircraft. Taking the AG300 aircraft as the subject, this paper proposes a method for generating and simplifying the electromagnetic topology coupling path set for aviation systems. Based on electromagnetic topology theory, an electromagnetic coupling path set for external electromagnetic interference entering the aircraft was constructed. The methods for obtaining coupling coefficients under different coupling paths, including slots, cable bundles, and dielectric wave propagation, were studied. The coupling path set was simplified through a three-tier screening method and validated for application, providing technical support for the electromagnetic vulnerability analysis and forward design of aircraft.