Antennas and Next Generation Mobile Communication Systems

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: closed (30 April 2021) | Viewed by 9988

Special Issue Editor


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Guest Editor
Campus Muralla del Mar. Antiguo Cuartel de Antigones, Universidad Politécnica de Cartagena, E-30202 Cartagena, Spain
Interests: MIMO; antennas; wireless propagation

Special Issue Information

Dear Colleagues,

New Radio (NR) is eagerly expected as the solution for current wireless communications demands, aiming to provide fast throughput and low latency, with a significant improvement in user’s quality of service (QoS) and quality of experience (QoE). With the initial deployments in place and the first 5G smartphones in the market, the primary concern is the need to satisfy the exponential rise in user and traffic capacity in mobile broadband communications. Global mobile traffic will experience a growth from 7201 petabytes per month in 2016 to around 48,270 petabytes per month in 2021, an astonishing 670% growth. NR is also expected to handle an enormous number of devices connected to IP networks, some three times as high as the global population in 2021, increasing from 2.3 networked devices per capita in 2016 to 3.5 by 2021. To add complexity, a perceived availability of 99.999% and ultra-reliability are also envisioned as key features of 5G.

Although still limited to single-cell use cases and with many deployments restricted to TDD Sub-6 GHz frequency bands, there is a tremendous pressure on carriers for full 5G deployment wherein base station and device performance prediction represent key factors when determining the success ratios of the new technology. The realistic answers that a 5G OTA test system should provide are far from being obtained to date, and simple yet-to-be-determined key performance indicators (KPIs) need to be developed, and fast. One clear example is beamforming, an essential feature of 5G. How can effective beamforming be predicted for a device using a simple pass/fail criteria over a specific KPI? The answer is not simple, since the problem is complex. In this Special Issue, novel key performance indicators for 5G mobile communications will be presented, as well as challenges ahead with possible solutions identified. Topics like massive MIMO evaluation, effective OTA test methods, realistic use of mmWave frequencies, or latency-related aspects will also be important topics to be tackled in this Issue.

Dr. David A. Sánchez-Hernádez
Guest Editor

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Keywords

  • massive MIMO
  • OTA
  • 5G
  • key performance indicators

Published Papers (2 papers)

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Research

12 pages, 3660 KiB  
Article
Beamforming Evaluation of 5G User Equipment through Novel Key Performance Indicators
by Miguel Á. García-Fernández and David A. Sánchez-Hernández
Electronics 2021, 10(11), 1319; https://doi.org/10.3390/electronics10111319 - 31 May 2021
Cited by 1 | Viewed by 2105
Abstract
Several standards exist for testing the radiated “over the air” (OTA) performance of 5G User Equipment (UE) devices. All these standards are limited to a Single-Input Single-Output (SISO) evaluation of the 5G device. With 5G networks and devices already deployed and in operation, [...] Read more.
Several standards exist for testing the radiated “over the air” (OTA) performance of 5G User Equipment (UE) devices. All these standards are limited to a Single-Input Single-Output (SISO) evaluation of the 5G device. With 5G networks and devices already deployed and in operation, it becomes necessary to develop realistic Multiple-Input Multiple-Output (MIMO) and beamforming performance metrics for 5G UEs. Since the most important feature of 5G is beamforming, this paper reviews the main challenges to realistically evaluate 5G device performance and proposes several novel key performance indicators (KPIs). The results obtained by some measurements show that it is possible to derive figures of merit that address the complexity of beamforming and MIMO-based 5G performance of devices in a much better way compared with the existing SISO KPIs, and that academia should provide advanced future research on these more realistic KPIs for the industry to face the challenges ahead with a better analysis of the problem in hand. Full article
(This article belongs to the Special Issue Antennas and Next Generation Mobile Communication Systems)
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12 pages, 3811 KiB  
Article
Broadband Dual-Polarized Loop Cross-Dipole Antenna for 5G Base Station Applications
by Chenyang Liao, Bin Wang, Congcong Zhu, Honggang Hao and Bo Yin
Electronics 2020, 9(10), 1574; https://doi.org/10.3390/electronics9101574 - 25 Sep 2020
Cited by 5 | Viewed by 7484
Abstract
A broadband dual-polarized base station antenna is proposed in this paper. The antenna consists of loop cross-dipoles, Y-shaped coupling feeding lines, and a metal box reflector. An equivalent circuit model including a signal flow diagram is established to analyze the mechanism of the [...] Read more.
A broadband dual-polarized base station antenna is proposed in this paper. The antenna consists of loop cross-dipoles, Y-shaped coupling feeding lines, and a metal box reflector. An equivalent circuit model including a signal flow diagram is established to analyze the mechanism of the proposed antenna in detail. Moreover, the Y-shaped coupling feeding lines are introduced to control the coupling with the antenna to achieve broadband and good impedance matching. The prototype of the antenna is fabricated and measured. The measured results show that the antenna with simple structures can operate at the band of 3.2–5.22 GHz (48%) with high port-to-port isolation (35 dB) and stable gain (9 ± 1 dBi). The measured results show good agreement with simulated results, especially in cross-polarization discrimination ratio (>27 dB) and the half power beam width (61° ± 3° at the E-plane, 68° ± 3° at the H-plane). In summary, the proposed antenna could be a good candidate for 5G sub-6 GHz base station applications. Full article
(This article belongs to the Special Issue Antennas and Next Generation Mobile Communication Systems)
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