User Body Effect on Phased Array in User Equipment for the 5G mmWave Communication System

Zhao, Kun; Helander, Jakob; Sjöberg, Daniel; He, Sailing; Bolin, Thomas; Ying, Zhinong

doi:10.1109/lawp.2016.2611674

Cited by 65 publications

(41 citation statements)

References 10 publications

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“…The performance investigation of the phased arrays with user effects has been done at 3.5 GHz in [19], where four subarrays of two elements each have been applied. Similar studies have been conducted in [9] and [20] at 28 and 15 GHz respectively.…”

Section: Introductionsupporting

confidence: 71%

Investigation of User Effects on Mobile Phased Antenna Array from 5 to 6 GHz

Paola¹,

Syrytsin²,

Zhang³

et al. 2018

12th European Conference on Antennas and Propagation (EuCAP 2018)

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The goal of this paper is to evaluate the impact of the user to the performance of a phased antenna array in the frequency range from 5 to 6 GHz. The design consists of four quarter wavelength dipoles printed on the short edge of an FR4 substrate. Simulations including a 105°phase shifter proved that the antenna array can cover a 120°beamwidth, with a gain of 7 dBi. The analysis of the user effects in terms of total scan pattern (TSP) and coverage efficiency is carried out via simulations both in data mode and in talk mode. The comparison with the performance in free space shows a loss in gain from 2 dB up to 7 dB, due to the user hand and the user hand-head respectively. Simulation results have been confirmed by the measurements of the prototype with a hand and head phantoms.

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Section: Introductionsupporting

confidence: 71%

Investigation of User Effects on Mobile Phased Antenna Array from 5 to 6 GHz

Paola¹,

Syrytsin²,

Zhang³

et al. 2018

12th European Conference on Antennas and Propagation (EuCAP 2018)

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“…8. It can be seen that the radiation patterns have similarities to the measured patterns in [18], but the position of the antenna makes a big difference on the radiation pattern shape. In the talk mode, the radiation pattern is mainly distorted by the user's head.…”

Section: A Radiation Patternmentioning

confidence: 67%

“…The impact of the user's hand/hands on the mobile antenna performance has been studied in [16] and [17], where it has been concluded that the position and height of the antenna and position of the fingers on the mobile terminal play a major role in the mobile antenna performance. The effect of the user on the coverage and the radiation pattern of a phased antenna array has been studied in [18]. However the statistical investigation of the user impact or coverage efficiency of the mobile antenna at 28 GHz has not been done yet.…”

Section: Introductionmentioning

confidence: 99%

Statistical Investigation of the User Effects on Mobile Terminal Antennas for 5G Applications

Syrytsin

Zhang

Pedersen

et al. 2017

IEEE Trans. Antennas Propagat.

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In this paper the user effects on mobile terminal antennas at 28 GHz are statistically investigated with the parameters of body loss, coverage efficiency and power in the shadow. The data are obtained from the measurements of 12 users in data and talk modes, with the antenna placed on the top and bottom of the chassis. In the measurements, the users hold the phone naturally. The radiation patterns and shadowing regions are also studied. It is found that a significant amount of power can propagate into the shadow of the user by creeping waves and diffractions. A new metric is defined to characterize this phenomenon. A mean body loss of 3.2-4 dB is expected in talk mode, which is also similar to the data mode with the bottom antenna. A body loss of 1 dB is expected in data mode with the top antenna location. The variation of the body loss between the users at 28 GHz is less than 2 dB, which is much smaller than that of the conventional cellular bands below 3 GHz. The coverage efficiency is significantly reduced in talk mode, but only slightly affected in data mode.

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“…3) The DPA-MIMO topology provides a solution to human body blockage which could lead to severe attenuation at mmWave frequencies [24]. For example, the attenuation can be as high as 30 to 40 dB for the 73 GHz band as given in [25].…”

Section: B Novel Distributed Phased Array Based Mimo Architecturementioning

confidence: 99%

5G Cellular User Equipment: From Theory to Practical Hardware Design

2017

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Research and development on the next generation wireless systems, namely 5G, has experienced explosive growth in recent years. In the physical layer (PHY), the massive multiple-input-multiple-output (MIMO) technique and the use of high GHz frequency bands are two promising trends for adoption. Millimeter-wave (mmWave) bands such as 28 GHz, 38 GHz, 64 GHz, and 71 GHz, which were previously considered not suitable for commercial cellular networks, will play an important role in 5G. Currently, most 5G research deals with the algorithms and implementations of modulation and coding schemes, new spatial signal processing technologies, new spectrum opportunities, channel modeling, 5G proof of concept (PoC) systems, and other system-level enabling technologies. In this paper, we first investigate the contemporary wireless user equipment (UE) hardware design, and unveil the critical 5G UE hardware design constraints on circuits and systems. On top of the said investigation and design trade-off analysis, a new, highly reconfigurable system architecture for 5G cellular user equipment, namely distributed phased arrays based MIMO (DPA-MIMO) is proposed. Finally, the link budget calculation and data throughput numerical results are presented for the evaluation of the proposed architecture.Comment: Submitted to IEEE ACCESS. It has 18 pages, 17 figures, and 5 table

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User Body Effect on Phased Array in User Equipment for the 5G mmWave Communication System

Cited by 65 publications

References 10 publications

Investigation of User Effects on Mobile Phased Antenna Array from 5 to 6 GHz

Investigation of User Effects on Mobile Phased Antenna Array from 5 to 6 GHz

Statistical Investigation of the User Effects on Mobile Terminal Antennas for 5G Applications

5G Cellular User Equipment: From Theory to Practical Hardware Design

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