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User Body Effect on Phased Array in User Equipment for the 5G mmWave Communication System
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
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2017 (English)In: IEEE Antennas and Wireless Propagation Letters, ISSN 1536-1225, E-ISSN 1548-5757, Vol. 16, 864-867 p.Article in journal (Refereed) Published
Abstract [en]

The millimeter-wave phased array in the user equipment (UE) for 5G communication is studied in this letter. In particular, the body effect on the phased array in the UE at 15 GHz is investigated with the 3-D measurement data, and its impact on some key parameters for phased array in the UE, such as the total scan pattern, the coverage efficiency, and the probability of detection, are analyzed.

Place, publisher, year, edition, pages
IEEE, 2017. Vol. 16, 864-867 p.
Keyword [en]
Coverage efficiency, fifth-generation mobile system, human body effects, millimeter wave (mmWave), phased array, user equipment (UE) antenna
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-208282DOI: 10.1109/LAWP.2016.2611674ISI: 000399319100039Scopus ID: 2-s2.0-85018949860OAI: oai:DiVA.org:kth-208282DiVA: diva2:1107557
Note

QC 20170609

Available from: 2017-06-09 Created: 2017-06-09 Last updated: 2017-10-05Bibliographically approved
In thesis
1. Mobile Antenna Systems for 4G and 5G Applications with User Body Interaction
Open this publication in new window or tab >>Mobile Antenna Systems for 4G and 5G Applications with User Body Interaction
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In the thesis, the user body effect on antennas in a mobile terminal is discussed. In order to overcome the degradation of Multiple-Input Multiple-Output (MIMO) performance due to the user body effect, a quad-elements MIMO antenna array which can mitigate the body effect through an adaptive antenna switching method is introduced for 4G mobile terminals. In addition, various bezel MIMO antennas that are robust to the impedance mismatching caused by the user effect have also been presented.

The study of user body effect is later extended to frequency bands at 15 GHz and 28 GHz for future 5G communication systems. The results reveal that a human body will cause a significant shadowing loss, which will be a critical loss in 5G cellular networks.

The electromagnetic field (EMF) exposure of a mobile terminal is also studied in this thesis. Below 6 GHz, the simultaneous transmission specific absorption rate (SAR) for MIMO antennas is the primary concern due to its complicated assessment procedures. Above 6 GHz, the free space power density is adopted as the basic parameter of exposure limits globally, and preliminary studies have been presented to address major challenges in EMF exposure assessment for 5G mobile terminals. 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017. 65 p.
Series
TRITA-EE, ISSN 1653-5146 ; 2017:137
Keyword
Antenna, MIMO, mmWave, Mobile communication, SAR, Power density, User body effect, Channel modeling, Multiplex efficiency
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-215266 (URN)978-91-7729-550-1 (ISBN)
Public defence
2017-10-27, Kollegiesalen, Brinellvägen 8, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20171005

Available from: 2017-10-05 Created: 2017-10-05 Last updated: 2017-11-08Bibliographically approved

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Zhao, KunHe, Sailing

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