scholarly journals Dual Band and Dual Diversity Four-Element MIMO Dipole for 5G Handsets

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 767
Author(s):  
Muhammad Ali Jamshed ◽  
Masood Ur-Rehman ◽  
Jaroslav Frnda ◽  
Ayman A. Althuwayb ◽  
Ali Nauman ◽  
...  
Keyword(s):  
Multiple Input Multiple Output ◽  
Human Head ◽  
Dipole Antenna ◽  
Base Station ◽  
Dual Band ◽  
Head Model ◽  
Antenna Element ◽  
Total Efficiency ◽  
Large Space ◽  
Mobile Handset

The increasing popularity of using wireless devices to handle routine tasks has increased the demand for incorporating multiple-input-multiple-output (MIMO) technology to utilize limited bandwidth efficiently. The presence of comparatively large space at the base station (BS) makes it straightforward to exploit the MIMO technology’s useful properties. From a mobile handset point of view, and limited space at the mobile handset, complex procedures are required to increase the number of active antenna elements. In this paper, to address such type of issues, a four-element MIMO dual band, dual diversity, dipole antenna has been proposed for 5G-enabled handsets. The proposed antenna design relies on space diversity as well as pattern diversity to provide an acceptable MIMO performance. The proposed dipole antenna simultaneously operates at 3.6 and 4.7 sub-6 GHz bands. The usefulness of the proposed 4×4 MIMO dipole antenna has been verified by comparing the simulated and measured results using a fabricated version of the proposed antenna. A specific absorption rate (SAR) analysis has been carried out using CST Voxel (a heterogeneous biological human head) model, which shows maximum SAR value for 10 g of head tissue is well below the permitted value of 2.0 W/kg. The total efficiency of each antenna element in this structure is −2.88, −3.12, −1.92 and −2.45 dB at 3.6 GHz, while at 4.7 GHz are −1.61, −2.19, −1.72 and −1.18 dB respectively. The isolation, envelope correlation coefficient (ECC) between the adjacent ports and the loss in capacity is below the standard margin, making the structure appropriate for MIMO applications. The effect of handgrip and the housing box on the total antenna efficiency is analyzed, and only 5% variation is observed, which results from careful placement of antenna elements.

scholarly journals Dual-Band MIMO Antenna for 5G/WLAN Mobile Terminals

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 489
Author(s):  
Jianlin Huang ◽  
Guiting Dong ◽  
Qibo Cai ◽  
Zhizhou Chen ◽  
Limin Li ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Multiple Input Multiple Output ◽  
Open Loop ◽  
Dual Band ◽  
Antenna Element ◽  
Total Efficiency ◽  
Mimo Antenna ◽  
Single Antenna ◽  
Loop Ring ◽  
5 Ghz

This paper presents a dual-band four-element multiple-input-multiple-output (MIMO) array for the fifth generation (5G) mobile communication. The proposed antenna is composed of an open-loop ring resonator feeding element and a T-shaped radiating element. The utilization of the open-loop ring resonator not only reduces the size of the antenna element, but also provides positive cross-coupling. The dimension of a single antenna element is 14.9 mm × 7 mm (0.27λ × 0.13λ, where λ is the wavelength of 5.5 GHz). The MIMO antenna exhibits a dual-band feature from 3.3 to 3.84 GHz and 4.61 to 5.91 GHz, which can cover 5G New Radio N78 (3.3–3.8 GHz), 5G China Band N79 (4.8–5 GHz), and IEEE 802.11 ac (5.15–5.35 GHz, 5.725–5.85 GHz). The measured total efficiency and isolation are better than 70% and 15 dB, respectively. The calculated envelope correlation coefficient (ECC) is less than 0.02. The measured results are in good agreement with the simulated results.

scholarly journals Dual-Band 2 × 2 MIMO Antenna with Compact Size and High Isolation Based on Half-Mode SIW

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Abubaker Ahmed Elobied ◽  
Xue-Xia Yang ◽  
Ningjie Xie ◽  
Steven Gao
Keyword(s):  
Multiple Input Multiple Output ◽  
Dual Band ◽  
Antenna Element ◽  
Mimo Antenna ◽  
High Isolation ◽  
Rectangular Patch ◽  
Compact Size ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Proximity Coupling

This paper presents a close-spaced dual-band 2 × 2 multiple-input multiple-output (MIMO) antenna with high isolation based on half-mode substrate integrated waveguide (HMSIW). The dual-band operation of the antenna element is achieved by loading a rectangular patch outside the radiating aperture of an HMSIW cavity. The HMSIW cavity is excited by a coaxial probe, whereas the rectangular patch is energized through proximity coupling by the radiating aperture of HMSIW. The antenna elements can be closely placed using the rotation and orthogonal arrangement for a 2 × 2 array. Small neutralization lines at the center of the MIMO antenna can increase the isolation among its elements by around 10 dB in the lower band and 5 dB in the higher band. A prototype of the MIMO antenna is fabricated and its performance is measured. The measured results show that the resonant frequencies are centered at 4.43 and 5.39 GHz with bandwidths of 110 and 80 MHz and peak gains of 6 and 6.4 dBi, respectively. The minimum isolation in both bands is greater than 35 dB. The envelope correlation coefficient is lower than 0.005 within two operating bands.

A Miniaturized Dual-Band Base Station Array Antenna Using Band Notch Dipole Antenna Elements and AMC Reflectors

2018 ◽  
Vol 66 (6) ◽  
pp. 3189-3194 ◽  
Author(s):  
Min Li ◽  
Qinlong Li ◽  
Bo Wang ◽  
Changfei Zhou ◽  
Singwai Cheung
Keyword(s):  
Dipole Antenna ◽  
Base Station ◽  
Array Antenna ◽  
Dual Band

scholarly journals A Quad-Port Dual-Band MIMO Antenna Array for 5G Smartphone Applications

Electronics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 542 ◽  
Author(s):  
Jianlin Huang ◽  
Guiting Dong ◽  
Jing Cai ◽  
Han Li ◽  
Gui Liu
Keyword(s):  
Antenna Array ◽  
Dual Band ◽  
Antenna Element ◽  
Total Efficiency ◽  
Smartphone Applications ◽  
Mimo Antenna ◽  
Single Antenna ◽  
Fifth Generation ◽  
5 Ghz ◽  
Better Than

A quad-port antenna array operating in 3.5 GHz band (3.4–3.6 GHz) and 5 GHz band (4.8–5 GHz) for fifth-generation (5G) smartphone applications is presented in this paper. The single antenna element consists of an L-shaped strip, a parasitic rectangle strip, and a modified Z-shaped strip. To reserve space for 2G/3G/4G antennas, the quad-port antenna array is printed along the two long frames of the smartphone. The evolution design and the analysis of the optimal parameters of a single antenna element are derived to investigate the principle of the antenna. The prototype of the presented antenna is tested and the measured results agree well with the simulation. The measured total efficiency is better than 70% and the isolation is larger than 16.5 dB.

scholarly journals THEORETICAL APPROACH OF THE INTERACTION BETWEEN A HUMAN HEAD MODEL AND A MOBILE HANDSET HELICAL ANTENNA USING NUMERICAL METHODS

2006 ◽  
Vol 65 ◽  
pp. 309-327 ◽  
Author(s):  
Nikolaos K. Kouveliotis ◽  
Stylianos C. Panagiotou ◽  
Pantelis K. Varlamos ◽  
Christos N. Capsalis
Keyword(s):  
Numerical Methods ◽  
Theoretical Approach ◽  
Human Head ◽  
Head Model ◽  
Helical Antenna ◽  
Human Head Model ◽  
Mobile Handset

scholarly journals Modeling and Simulation of Dual-band Yagi Antennas for Voice Communication on Microsatellite

2019 ◽  
Vol 11 (3) ◽  
pp. 68-72
Author(s):  
Muhammad Darsono ◽  
Ahmad Ruri Wijaya ◽  
Rommy Hartono
Keyword(s):  
Beam Width ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Dual Band ◽  
Antenna Element ◽  
Method Of Moment ◽  
Voice Communication ◽  
Software Application ◽  
Copper Pipe ◽  
Yagi Antenna

The design of the dual-band Yagi antenna was developed to support voice communication through voice repeaters on microsatellites in the UHF-VHV frequency from ground stations. The Yagi antenna is a type of half lambda dipole antenna that makes it easy to obtain direction and increase gain. The antenna is designed using the method of moment through a simulation with the CST microwave studio software application. The design used as an antenna element material is a type of copper pipe cylinder. The results of the Yagi antenna design in the VHF frequency consist of one driven element, one reflector element, and three director elements, while the UHF frequency consists of one reflector element and seven directors. The results of simulation parameters are obtained, such as Bandwidth of return loss below 10 dB is 4.3 MHz(VHF), and 44 MHz (UHF), VSWR (2:1) is 1.24 (VHF) and 1.36 (UHF), Gain is 9.19 dBi (VHF) and 10.5 dBi (UHF) and Beam Width is 64 degree (VHF) and 58 degree (UHF). The suitability of the antenna design target is dual-band, and Gain value in UHF is higher than VHF.

scholarly journals Dual-band magneto-electric dipole antenna with high-gain for base-station applications

2021 ◽  
Vol 134 ◽  
pp. 153696
Author(s):  
S. Khorasani ◽  
J. Nourinia ◽  
Ch. Ghobadi ◽  
M. Shokri ◽  
A. Hatamian ◽  
...  
Keyword(s):  
Electric Dipole ◽  
High Gain ◽  
Dipole Antenna ◽  
Base Station ◽  
Dual Band
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