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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Band Type Wearable Device's RF Configuration and Bent Microstrip Patch Antenna

밴드형 Wearable Device의 RF Configuration과 Bent 마이크로스트립 패치 안테나

  • Lee, Dongho (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Choi, Woo Cheol (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Kim, Sung Hoe (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Yoon, Young Joong (Department of Electrical & Electronic Engineering, Yonsei University)
  • 이동호 (연세대학교 전기전자공학과) ;
  • 최우철 (연세대학교 전기전자공학과) ;
  • 김성회 (연세대학교 전기전자공학과) ;
  • 윤영중 (연세대학교 전기전자공학과)
  • Received : 2014.10.10
  • Accepted : 2014.12.31
  • Published : 2015.01.30
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Abstract

In this paper, a bent microstrip patch antenna, which is suitable for band-type wearable devices and RF configuration, to be used in the WCDMA2100 mobile network is proposed. The proposed antenna using RF configuration which is consisted of separated Tx and Rx frequency band is designed to operate or function in WCDMA2100 Tx frequency band only and it is not strongly affected by the human body because of the conductor at the bottom side. At both flat case and bent case, the proposed antenna's maximum gain satisfies at least 5.3 dBi, and its -6 dB return loss bandwidth is wider than 20 MHz. The simulated surface absorption rate($SAR_{1g}$) result is under 0.7 [W/kg]. The proposed antenna suits in band-type wearable devices which is worn on wrists or arms.

본 논문에서는 WCDMA2100 이동통신망을 사용하는 밴드형 wearable device에 적합한 bent 마이크로스트립 패치 안테나와 이를 적용하기 위한 RF configuration을 제안하였다. 제안된 안테나는 WCDMA2100 송수신 주파수 대역을 분리한 RF configuration을 사용하여 WCDMA 송신대역에서만 동작하도록 설계되었고, 후면의 도체(ground)로 인해 인체의 영향을 적게 받는다. 제안된 안테나는 flat 및 bent할 경우 모두 최대 이득은 5.3 dBi 이상, -6 dB 반사손실 대역폭은 20 MHz 이상을 가지고 전자파 인체 흡수율 시뮬레이션 $SAR_{1g}$ 0.7 [W/kg] 이하를 갖는다. 제안된 안테나는 사람의 손목이나 팔에 착용하는 밴드형 wearable device에 적합하게 사용될 수 있다.

Keywords

References

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