HEMP (High-Altitude Electromagnetic Pulse) Validation of FAA (Federal Aviation Administration) Radio Facility

摘要

The Harry Diamond Lab. provided high-altitude electromagnetic pulse (HEMP) and partial lightning hardness verification testing to a high-frequency radio facility for the FAA. The facility consisted of a shielded enclosure with antennas and cables connected through protective devices at the shield to dummy loads within the shield. It was exposed to low-level radiation with measurements of internal fields extrapolated to threat levels and compared to specific criteria. Each typical penetration was injected with a simulated lightning source, and internal measurements were compared to specific criteria. Although criteria were not always met, it was judged with confidence that the facility would protect radio equipment. It was noted that the ac power spark gap would remain shorted until ac power shut down, resulting in system upset. Keywords: Electromagnetic shielding; Shield enclosure; HEMP test; Lightning test; HF Radio. (EDC)