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JKIEES, vol. 30, no. 9, pp.762-769, September, 2019
DOI. http://dx.doi.org/10.5515/KJKIEES.2019.30.9.762

Monostatic RCS Measurement for Transparent Conducting Oxide Coated Dielectric 투명 전도성 산화물이 코팅된 유전체의 단방향 레이다 단면적 측정

임형래․노영훈․홍익표*․권순형**․윤영준**․황민제***․최광식***․육종관 Hyeong Rae Im․Yeong Hoon Noh․Ic Pyo Hong*․Soon Hyeong Kwon**․ Young Joon Yoon**․Min Je Hwang***․Kwang Sik Choi***․Jong Gwan Yook
연세대학교 전기전자공학과(Department of Electric and Electronic Engineering, Yonsei University) *공주대학교 정보통신공학부(Department of Information and Communication Engineering, Kongju University) **한국세라믹기술원(Korea Institute of Ceramic Engineering and Technology) ***한국항공우주산업(주)(Korea Aerospace Industries, Ltd.)

In military weapon systems, the cockpit canopy that occupies a large region of a fighter aircraft requires both high visible light transmittance and Radar Cross Section(RCS) reduction performance. In this investigation, the monostatic RCS of an acrylic dielectric coated with a transparent conducting oxide that can realize high light transmittance and low haze characteristics in the visible spectrum, was experimentally analyzed. To calibrate the RCS measurement, assuming a perfect electric conductor, a conducting plate made of copper was used and the measurement error was minimized by satisfying the far-field condition of the antenna and scatterers. The monostatic RCS of TCO single-sided and double-sided coated samples was measured. As a result, an RCS reduction of approximately 2.9 dB and 7.24 dB, respectively, was confirmed under normal incidence condition, compared to the conducting plate. In addition, RCS variations of each sample were confirmed by measurement performed at 5° and 10° oblique incidence.

군사 무기 체계 중 전투기에서 구조적으로 큰 비중을 차지하는 조종석 캐노피는 레이다 단면적(radar cross section: RCS) 저감 성능 확보와 함께 높은 가시광선 투과율을 요구한다. 본 논문에서는 가시광선 영역에서 높은 광투과율과 낮은 Haze 특성 구현이 가능한 투명 전도성 산화물(transparent conducting oxide: TCO)이 코팅된 아크릴계 유전체의 단방향레이다 단면적(monostatic RCS) 특성을 실험을 통해 분석하였다. RCS 측정 교정을 위해 완전 도체를 가정한 구리로 된도체 평판을 사용하였고, 안테나 및 산란체의 원거리장 조건을 확보하여 측정 오차를 최소화시켰다. TCO 단면 및 양면코팅된 샘플의 monostatic RCS를 측정한 결과, 수직 입사 조건에서 도체 평판 대비 약 2.9 dB, 7.24 dB의 감소치를 확인하였다. 5º, 10º의 경사 입사 조건에서 각 샘플의 RCS 변화 경향 또한 측정을 통해 함께 확인하였다.

Keyword : Radar Cross Section(RCS), Transparent Conducting Oxide(TCO), Radar Absorbing Material(RAM), RCS Measurement

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