The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Radar Cross Section Reduction by Planar Array of Dielectric Barrier Discharge Plasma under Atmospheric Pressure

평면 배열 유전체 장벽 방전 플라즈마 발생기의 대기압에서의 레이다 단면적 감소 효과

  • Kim, Yuna (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Sangin (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Doo-Soo (Agency for Defense Development) ;
  • Lee, Yongshik (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Yook, Jong-Gwan (Department of Electrical and Electronic Engineering, Yonsei University)
  • Received : 2017.05.29
  • Accepted : 2017.08.11
  • Published : 2017.08.31
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Abstract

The effect of plasma on mono-static radar cross section under atmospheric pressure is demonstrated when the dielectric barrier discharge actuator has plasma layer. The volume of plasma layer is increased by using planar array of electrodes. Because the incident wave has electric field which is perpendicular to the electrode array, the undesired effect on radar cross section caused by structure of plasma actuator is minimized. In experiments, mono-static radar cross section is measured at the frequencies from 2 GHz to 25 GHz. The generated plasma reduces the radar cross section at frequencies above 18 GHz, and the amount of reduction reaches to 8 dB in maximum. The reduction can be controlled by changing the peak-to-peak voltage from high voltage generator. The result shows the possibility of plasma as a flexible radar cross section controller.

큰 부피의 플라즈마를 발생시키기 위하여 플라즈마 층을 포함하는 유전체 장벽 방전 구조(dielectric barrier discharge)를 제안하고, 발생기 동작 유무에 따른 모노스태틱 레이다 단면적(mono-static radar cross section)을 측정함으로써 대기압 플라즈마가 전자기파에 미치는 영향을 분석하였다. 다수의 전극을 평면으로 평행 배열함으로써 플라즈마 층의 부피를 증가시켰으며, 전극 배열과 수직인 방향의 전기장을 포함하는 전자기파를 입사시킴으로써 발생기와의 원치 않는 커플링을 최소화 시켰다. 실험 결과, 모노스태틱 레이다 단면적을 2 GHz부터 25 GHz까지 측정하였을 때, K band에서 최대 8 dB까지 감소하는 것을 확인하였다. 또한, 고전압 발생기의 인가 전압을 최대 20 kV까지 변화시킴으로써 원하는 주파수에서 플라즈마로 인한 감소치를 유연하게 조절 가능함을 보였다.

Keywords

References

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