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학술대회 Empirical Investigation of Antenna Beamwidth Effects on the ITU-R Building Entry Loss (BEL) Model Based on 32 GHz Measurements
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이주열, 김경원, 김명돈, 박재준, 정현규
Global Symposium on Millimeter Waves (GSMM) 2018, pp.1-3
18HR1400, 선제적 주파수 이용을 위한 시·공간적 스펙트럼 엔지니어링 기술 개발, 정영준
Recently, the ITU-R developed a building entry loss (BEL) propagation model covering millimeter-wave (mmWave) frequency bands, assuming omnidirectional antenna reception. Anticipating the application of directional beamforming (or antennas) employment in mmWave systems, this paper investigates the antenna beam width effects on the BEL based on 32 GHz measurements. We conducted the measurements with three antennas (Omni, 10째 horn and 30째 horn) at two building sites. These two buildings were specifically selected as candidates in that they followed the ITU-R building classifications of traditional type and thermally-efficient type. In both buildings, the BEL variations with respect to beam angle rotation were observed to be at least 17 dB (up to 50 dB); therefore, precise beam alignment is required. We also observed that the BEL increases as the beamwidth gets narrower, which is due to the fact that the narrower beamwidth antenna captures fewer multipath components while beamforming gain is normalized when calculating the propagation loss.
KSP 제안 키워드
Angle rotation, Antenna Beamwidth, Beam angle, Beamforming gain, Building entry loss, Empirical investigation, International telecommunications union radiocommunication(ITU-R), Omnidirectional Antenna, Propagation loss, beam alignment, frequency band