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

  • 제29권4호
  • /
  • Pages.241-246
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  • 2018
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  • 1226-3133(pISSN)
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  • 2288-226X(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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그라운드를 전환하여 주파수를 가변할 수 있는 광대역 메타물질 흡수체

Wideband Frequency Tunable Metamaterial Absorber Using Switchable Ground Plane

  • 정희준 (중앙대학교 전자전기공학부) ;
  • 임성준 (중앙대학교 전자전기공학부)
  • Jeong, Heijun (School of Electrical and Electronics Engineering, Chung-Ang University) ;
  • Lim, Sungjoon (School of Electrical and Electronics Engineering, Chung-Ang University)
  • 투고 : 2018.02.20
  • 심사 : 2018.04.04
  • 발행 : 2018.04.30
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초록

본 연구에서는 그라운드를 전환하여 주파수를 가변할 수 있는 광대역 메타물질 흡수체를 제안하였다. 그라운드 전환을 위해 두 개의 FR4 기판 구조를 제안하였으며, 중간 기판의 다이오드 ON/OFF에 따라 입사되는 신호의 반사, 투과를 조절하여 기판 두께에 따른 주파수 가변 구조를 제안하였다. 이를 증명하기 위해 시뮬레이션과 측정을 통해 중간층이 ON 상태일 경우, 3.5~11 GHz에서 90 % 이상의 흡수율을 가졌고, 중간층이 OFF 상태일 경우, 1.7~5.2 GHz에서 90 % 이상의 흡수율을 가졌다.

In this study, we proposed a wideband frequency tunable metamaterial absorber using a switchable ground plane (SGP). We proposed two fire retardant or flame resistant 4 (FR4) substrate structures for the SGP. An SGP is placed at the middle layer, between the top pattern and the bottom ground plane. The SGP can either be made ground or reactive, by switching the PIN diode ON/OFF. As the frequency is determined by the substrate thickness, the frequency can be switched from the SGP. The proposed absorber is demonstrated by full-wave simulations and measurements. When the SGP is turned on, an absorptivity higher than 90% is achieved from 3.5 GHz to 11 GHz. When the SGP is turned off, an absorptivity higher than 90 % is achieved from 1.7 GHz to 5.2 GHz.

키워드

참고문헌

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