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

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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X-band RADAR Reflected Signal Measurement of Gallium-based Liquid Metal

갈륨에 기초한 액체금속 X밴드 레이더 반사신호 측정

  • Minhyeok Kim (Department of Electrical Engineering, Korea Army Academy at Yeong-cheon) ;
  • Sehyeok Kang (Department of Electrical Engineering, Korea Army Academy at Yeong-cheon) ;
  • Seok-Joo Doo (Department of Electrical Engineering, Korea Army Academy at Yeong-cheon) ;
  • Daeyoung Kim (Department of Electrical Engineering, Korea Army Academy at Yeong-cheon)
  • 김민혁 (육군3사관학교 전자공학과) ;
  • 강세혁 (육군3사관학교 전자공학과) ;
  • 두석주 (육군3사관학교 전자공학과) ;
  • 김대영 (육군3사관학교 전자공학과)
  • Received : 2022.12.14
  • Accepted : 2023.05.31
  • Published : 2023.06.05
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Abstract

RADAR(Radio Detection and Ranging) is an important system for surveillance and reconnaissance by detecting a reflected signal which obtains the range from the radar to the target, and the velocity of the target. The magnitude of the reflected signal varies due to the radar cross section of the target, characteristic of the transmission and reception antenna, distance between the radar and the target, and power and wavelength of the transmitted signal. Thus, the RCS is the important characteristic of the target to determine if the target can be observed by the RADAR system. It is based on the material and shape of the target. We have measured the reflection signal of a simple square-shaped (20 × 20 cm) target made of a new material, a gallium-based liquid metal alloy and compared that of well-known metals including copper, aluminum. The magnitude of reflected signal of the aluminum target was the largest and it was 2.4 times larger than that of the liquid metal target. We also investigated the effect of the shape by measuring reflectance of the F-22 3D model(~1/95 ratio) target covered with/without copper, aluminium, and liquid metal. The largest magnitude of the reflected signal measured from side-view with the copper-covered F-22 model was 2.6 times greater than that of liquid metal. The reflectance study of the liquid metal would be helpful for liquid metal-based frequency selective surface or metamaterials.

Keywords

Acknowledgement

본 논문은 육군3사관학교 충성대연구소의 지원을 받았습니다.

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