Millimeter-wave frequency bands have been considered as candidate bands for the next generation (5G) mobile communications. For successful 5G development, studying millimeter-wave propagation channels is important. Since a lineof-sight (LOS) path between stations is easily blocked by a building in urban environments, diffraction models are important to predict non-line-of-sight (NLOS) wireless channels. However, due to high diffraction loss and environmental constraints, studies on diffraction loss in millimeter-wave bands have not been conducted sufficiently yet. Several investigations of diffraction loss in millimeter-wave bands have been performed, but they are limited by short distance propagation or small diffraction angles. This paper provides a diffraction loss model based on 28 GHz measurements. The distance range of the measurements is up to about 150 m and the diffraction angle range is up to about 50 degrees.
KSP Keywords
28 GHz, Diffraction loss, Line of sight(LOS), Loss model, Millimeter-wave band, Non-line-of-sight(NLOS), Propagation Channel, Wireless Channel, environmental constraints, frequency band, millimeter wave(mmWave)
Copyright Policy
ETRI KSP Copyright Policy
The materials provided on this website are subject to copyrights owned by ETRI and protected by the Copyright Act. Any reproduction, modification, or distribution, in whole or in part, requires the prior explicit approval of ETRI. However, under Article 24.2 of the Copyright Act, the materials may be freely used provided the user complies with the following terms:
The materials to be used must have attached a Korea Open Government License (KOGL) Type 4 symbol, which is similar to CC-BY-NC-ND (Creative Commons Attribution Non-Commercial No Derivatives License). Users are free to use the materials only for non-commercial purposes, provided that original works are properly cited and that no alterations, modifications, or changes to such works is made. This website may contain materials for which ETRI does not hold full copyright or for which ETRI shares copyright in conjunction with other third parties. Without explicit permission, any use of such materials without KOGL indication is strictly prohibited and will constitute an infringement of the copyright of ETRI or of the relevant copyright holders.
J. Kim et. al, "Trends in Lightweight Kernel for Many core Based High-Performance Computing", Electronics and Telecommunications Trends. Vol. 32, No. 4, 2017, KOGL Type 4: Source Indication + Commercial Use Prohibition + Change Prohibition
J. Sim et.al, “the Fourth Industrial Revolution and ICT – IDX Strategy for leading the Fourth Industrial Revolution”, ETRI Insight, 2017, KOGL Type 4: Source Indication + Commercial Use Prohibition + Change Prohibition
If you have any questions or concerns about these terms of use, or if you would like to request permission to use any material on this website, please feel free to contact us
KOGL Type 4:(Source Indication + Commercial Use Prohibition+Change Prohibition)
Contact ETRI, Research Information Service Section
Privacy Policy
ETRI KSP Privacy Policy
ETRI does not collect personal information from external users who access our Knowledge Sharing Platform (KSP). Unathorized automated collection of researcher information from our platform without ETRI's consent is strictly prohibited.
[Researcher Information Disclosure] ETRI publicly shares specific researcher information related to research outcomes, including the researcher's name, department, work email, and work phone number.
※ ETRI does not share employee photographs with external users without the explicit consent of the researcher. If a researcher provides consent, their photograph may be displayed on the KSP.