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

  • 제26권3호
  • /
  • Pages.246-251
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  • 2023
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  • 1598-9127(pISSN)
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  • 2636-0640(eISSN)
한국군사과학기술학회 (The Korea Institute of Military Science and Technology)
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갈륨에 기초한 액체금속 X밴드 레이더 반사신호 측정

X-band RADAR Reflected Signal Measurement of Gallium-based Liquid Metal

  • 김민혁 (육군3사관학교 전자공학과) ;
  • 강세혁 (육군3사관학교 전자공학과) ;
  • 두석주 (육군3사관학교 전자공학과) ;
  • 김대영 (육군3사관학교 전자공학과)
  • 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)
  • 투고 : 2022.12.14
  • 심사 : 2023.05.31
  • 발행 : 2023.06.05
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초록

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.

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과제정보

본 논문은 육군3사관학교 충성대연구소의 지원을 받았습니다.

참고문헌

  1. T. Liu, P. Sen, and C. J. Kim, "Characterization of Nontoxic Liquid-Metal Alloy Galinstan for Applications in Microdevices," Journal of Microelectromechanical Systems, Vol. 21, No. 2, pp. 443-450, Apr. 2012. https://doi.org/10.1109/JMEMS.2011.2174421
  2. Daeyoung Kim et al., "On-Demand Frequency Tunability of Fluidic Antenna Implemented with Gallium-based Liquid Metal Alloy," Eur. Phys. J. Appl. Phys., Vol. 78, No. 1, Apr. 2017.
  3. K. Ling, K. Kim, and S. Lim, "Flexible Liquid Metal-Filled Metamaterial Absorber on Polydimethylsiloxane(PDMS)," Opt. Express 23, 21375-21383, 2015. https://doi.org/10.1364/OE.23.021375
  4. K. Xu, J. H. Choi, K. Payne, J. K. Lee and J. -B. Lee, "Flexible Liquid Metal Frequency Selective Surface With Tunable Second-Order Bandpass Response," 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, pp. 725-726, 2020.
  5. Deng, Guangsheng, Fang, Linying, Yang, Jun, Yin, Zhiping and Fang, Yong, "Liquid Metal-based Metamaterial with High-Temperature Sensitivity: Design and Computational Study," Open Physics, Vol. 19, No. 1, 2021, pp. 735-741. https://doi.org/10.1515/phys-2021-0086
  6. Kyoungmin Song, Minjung Moon, Wookyung Lee, "Experimental Study of Drone Detection and Classification through FMCW ISAR and CW Micro-  Doppler Analysis," Journal of the Korea Institute of Military Science and Technology, Vol. 21, No. 2, pp. 147-157, 2018.
  7. Euntae Jung, Jinwoo Park, Byunggil Yu, Youngdam Kim, Kichul Kim, Jongwoo Seo, "A Study on RCS Perfomance with Antenna Transmit Singal on/off in the X-band Incident Wave Environment," Journal of the Korea Institute of Military Science and Technology, Vol. 23, No. 1, pp. 59-65, 2020.