Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study on the Measurement Method of Test Waveform for System-level HEMP Immunity Test

체계 수준 HEMP 내성 시험을 위한 시험파형 계측 기법 연구

  • Yeo, Saedong (The 7th Research and Development Institute, Agency for Defense Development)
  • 여세동 (국방과학연구소 제7기술연구본부)
  • Received : 2018.10.22
  • Accepted : 2019.02.08
  • Published : 2019.04.05
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Abstract

High-altitude ElectroMagnetic Pulse(HEMP) is a high-power electromagnetic pulse caused by nuclear explosions at altitudes above 30 km. This pulse can cause serious damage to the electrical/electronic device. Therefore, there are a lot of studies on the effects of HEMP in the literature. When conducting studies on the effects of HEMP, it is essential to measure the simulated HEMP. Depending on the need for measurement, this paper focuses on the HEMP measurement method. This paper proposes a measurement method using frequency domain compensation to extract the correct waveform and solves the offset problem more efficiently than the conventional methods. The proposed method is verified by experiment using HEMP simulator and measurement system in ADD.

Keywords

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Fig. 1. Typical HEMP waveform in time domain

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Fig. 2. Frequency response of typical HEMP waveform

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Fig. 3. HEMP Simulator in ADD

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Fig. 4. Signal measurement chain

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Fig. 5. Compensation process

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Fig. 6. Transfer function of BALUN

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Fig. 7. Transfer function of coaxial cable

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Fig. 8. Transfer function of fiber-optic data link

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Fig. 9. Raw data in the time domain

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Fig. 10. Comparison of frequency response between the raw data and the compensated data

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Fig. 11. Comparison of frequency response between the time domain compensation and the frequency domain compensation

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Fig. 12. Transfer function of current probe

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Fig. 13. Integrated waveform with offset

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Fig. 14. Comparison of adjustment of the offset

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Fig. 15. Comparison of E-field between the conventional and the proposed method

Table 1. Type of sensors

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References

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