Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Analysis on Change in Electrical Transmission Characteristic about FSS Radome on Flight Scenario

비행 시나리오에 따른 FSS 레이돔의 전파 투과 특성 변화 분석

  • Kim, Sunhwi (Department of Mechanical Engineering, Yonsei University) ;
  • Bae, Hyung Mo (Department of Mechanical Engineering, Yonsei University) ;
  • Kim, Jihyuk (Department of Mechanical Engineering, Yonsei University) ;
  • Lee, Namkyu (Department of Mechanical Engineering, Yonsei University) ;
  • Nam, Juyeong (Department of Mechanical Engineering, Yonsei University) ;
  • Park, Sehjin (Department of Mechanical Engineering, Yonsei University) ;
  • Cho, Hyung Hee (Department of Mechanical Engineering, Yonsei University)
  • Received : 2019.05.23
  • Accepted : 2019.09.03
  • Published : 2019.12.01
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Abstract

A Radome protects the radar from the external environment, and as a part of the stealth technology, a frequency-selective surface (FSS) was applied to the radome. Our study investigates the changes in the electrical transmission characteristics of the missile's FSS radome due to aerodynamic heating in various flight scenarios. Accordingly, we designed a FSS radome with a Jerusalem-cross(JSC) geometry and referred the missile flight scenario in the precedent research. Subsequently, electrical transmission characteristics affected by aerodynamic heating were numerically analyzed over time according to the position of radome. As a result, we found that the average transmission value maximally varies -14.3 dB compared to the initial bandwidth owing to changes in electrical transmission characteristics in flight scenarios.

레이돔은 레이더를 외부 환경으로부터 보호하는 역할을 하며, 스텔스 기술의 일환으로 주파수 선택 표면이 레이돔에 적용되고 있다. 본 연구에서는 Jerusalem-cross(JSC) 형상이 적용된 주파수 선택 표면 레이돔에 대해 비행 시나리오 상 공력가열로 인해 미사일의 FSS 레이돔의 전파 투과 특성의 변화를 다루었다. 이 내용을 바탕으로 공력가열에 따른 전파 투과 특성을 레이돔의 위치에 따라, 시간에 따라 수치 해석적으로 분석하였다. 수치 해석적 연구로 상용 프로그램 ANSYS Fluent 15.0과 COMSOL Multiphysics 5.2를 사용하였다. 비행 시나리오 상 전파 투과 특성의 변화로 초기 대역폭에 대한 평균 투과율 수치가 최대 -14.3 dB까지 변화하는 것을 확인할 수 있었다.

Keywords

References

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