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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Analysis of Wireless Signal Strength in Indoor Environment with Film-Type Dual-Band Frequency Selective Structure

필름형 이중 대역 주파수 선택 구조가 적용된 실내 환경의 무선신호강도 분석

  • Cho, Sung-Sil (Department of Information & Communication Engineering, Kongju National University) ;
  • Lee, Sang-Hwa (Department of Information & Communication Engineering, Kongju National University) ;
  • Yoon, Sun-Hong (IT Application Research Center, Korea Electronics Technology Institute) ;
  • Hong, Ic-Pyo (Department of Information & Communication Engineering, Kongju National University)
  • 조성실 (국립공주대학교 정보통신공학부) ;
  • 이상화 (국립공주대학교 정보통신공학부) ;
  • 윤선홍 (전자부품연구원) ;
  • 홍익표 (국립공주대학교 정보통신공학부)
  • Received : 2017.10.16
  • Accepted : 2017.12.15
  • Published : 2018.01.31
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Abstract

In this paper, we propose a film-type dual-band frequency selective structure for improving the wireless communication environment in a building. The proposed frequency-selective structure is a miniaturized structure that can control the resonant frequencies of 2.4 GHz and 5 GHz dual band through simple design parameters. We fabricated the frequency-selective surface by screen printing using conductive ink on a thin transparent film and confirmed its performance by measurement. We analyzed the attenuation performance of the unnecessary signal from the outside when the frequency-selective structure designed using the software to analyze the propagation environment performance is applied to the building. To verify the analytical results, the signal strength of the indoor environment was measured by applying the frequency-selective film fabricated on the inner wall of the actual building. The measurement results show that the dual-band frequency-selective film has 29.4 dB and 15.94 dB attenuation performance in the 2.4 GHz and 5 GHz, respectively.

본 논문에서는 건물 내 무선 통신환경 개선을 위한 필름형 이중 대역 주파수 선택 구조를 제안하였다. 제안한 주파수 선택 구조는 간단한 설계 변수를 통해 2.4 GHz와 5 GHz 이중 대역의 공진 주파수를 제어할 수 있는 소형화된 구조로 얇은 투명 필름 위에 스크린 프린팅 방식을 사용하여 설계 및 제작하였으며, 측정을 통해 성능을 확인하였다. 건물 내에 전파환경 성능 분석이 가능한 소프트웨어를 사용하여 설계한 FSS 구조를 건물에 적용했을 때 실외로부터 유입되는 불요신호에 대한 감쇠 성능을 분석하였다. 또한 분석 결과를 검증하기 위하여 실제 건물 내벽에 제작한 FSS 필름을 적용하여 실내 환경의 신호강도를 측정하였다. 측정결과 제작된 이중 대역 주파수 선택 구조는 실제 건축물에 적용할 경우 2.4 GHz와 5 GHz 대역에서 각각 29.4 dB, 15.94 dB의 감쇠 성능을 가짐을 확인하였다.

Keywords

References

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