ETRI Journal

  • 제42권1호
  • /
  • Pages.7-16
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  • 2020
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Millimeter-wave directional-antenna beamwidth effects on the ITU-R building entry loss (BEL) propagation model

  • Lee, Juyul (Hyper-connected Communication Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Kim, Kyung-Won (Hyper-connected Communication Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Kim, Myung-Don (Hyper-connected Communication Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Park, Jae-Joon (Hyper-connected Communication Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Yoon, Young Keun (Broadcasting Media Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Chong, Young Jun (Broadcasting Media Research Laboratory, Electronics and Telecommunications Research Institute)
  • 투고 : 2018.11.21
  • 심사 : 2019.06.03
  • 발행 : 2020.02.07
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초록

Assuming omnidirectional antenna reception, the ITU-R recently developed a new propagation model on building entry loss (BEL) for 5G millimeter-wave frequency sharing and compatibility studies, which is a simplified outdoor-to-indoor path loss model. Considering the utilization of high-gain narrow-beamwidth beamforming, the omnidirectional-based ITU-R BEL model may not be appropriate to predict propagation characteristics for directional beamforming scenarios. This paper studies the effects of beamwidth on the ITU-R BEL model. This study is based on field measurements collected with four different beamwidth antennas: omnidirectional, 10° horn, 30° horn, and 60° horn. The measurement campaigns were conducted at two types of building sites: traditional and thermally efficient buildings. These sites, as well as the measurement scenarios, were carefully chosen to comply with the ITU-R BEL measurement guidelines and the ITU-R building types. We observed the importance of accurate beam alignment from the BEL variation range. We were able to quantify the beamwidth dependency by fitting to a model that is inversely proportional to the beamwidth.

키워드

참고문헌

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