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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Reduction of Electromagnetic Interference between the LCD Driving Module and WWAN Antennas

LCD 구동 모듈과 WWAN 안테나 간의 전자기 간섭 감소에 대한 연구

  • Kim, In-Bok (School of Electronics Engineering, Kyoungpook National University) ;
  • Park, Jin-Hyun (School of Electronics Engineering, Kyoungpook National University) ;
  • Kang, Il-Heung (School of Electronics Engineering, Kyoungpook National University) ;
  • Kim, Hong-Joon (School of Electronics Engineering, Kyoungpook National University) ;
  • Woo, Dong-Sik (School of Electronics Engineering, Kyoungpook National University) ;
  • Kim, Kang-Wook (School of Electronics Engineering, Kyoungpook National University)
  • Received : 2012.02.28
  • Accepted : 2012.04.23
  • Published : 2012.06.30
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Abstract

In this paper, we analyzed the RF interactions between WWAN antennas and an LCD driving module inside the cover of a notebook computer, and discussed reduction method of RF coupling. In order to simulate the RF noise source from the LCD driving module, a multi-band antenna was designed and used with a simplified notebook model to test the RF coupling phenomena. We verified that the RF noise coupling is enhanced at certain frequencies due to cavity structure formed inside the notebook computer. Also, we showed that conductive barrier walls, which are inserted inside the notebook, could be effective in reducing RF coupling.

본 논문에서는 WWAN 대역의 노트북 안테나와 LCD 구동 모듈 간의 전자기 간섭이 노트북의 무선 통신에 끼치는 영항을 분석하고, 이러한 간섭을 줄이기 위한 대책을 논의하였다. LCD 구동 모듈에 의한 잡음원을 모의하기 위해 다중 대역 안테나를 설계, 제작하였고, 이를 사용하여 노트북 내에서 전자기 간섭에 의한 효과를 시뮬레이션 및 모델 실험을 통해 분석하였다. 그 결과, 노트북의 구조에 기인한 특정 주파수 대역에서 더 많은 잡음이 전달될 수 있음을 확인하였다. 또한, 구조물 변화에 의한 잡음 전달의 감소를 위해 구조물에 격벽을 세우고, 그 크기를 변경하며 전자기 간섭을 분석하였으며, 이러한 구조 변경이 통신 대역 내의 전자기 간섭을 감소시킬 수 있음을 보여주었다.

Keywords

References

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