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학술지 Millimeter-wave Directional-antenna Beamwidth Effects on the ITU-R Building Entry Loss (BEL) Propagation Model
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저자
이주열, 김경원, 김명돈, 박재준, 윤영근, 정영준
발행일
202002
출처
ETRI Journal, v.42 no.1, pp.7-16
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.2018-0662
협약과제
18HR1400, 선제적 주파수 이용을 위한 시·공간적 스펙트럼 엔지니어링 기술 개발, 정영준
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, 10째 horn, 30째 horn, and 60째 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.
KSP 제안 키워드
5G millimeter-wave, Antenna Beamwidth, BEL model, Building entry loss, Field measurement, Frequency sharing, International telecommunications union radiocommunication(ITU-R), Omnidirectional Antenna, Outdoor-to-Indoor path loss model, Propagation characteristics, Thermally efficient
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