A high isolation dual-band MIMO antenna array for multiaccess mobile terminals

With the development of 5G, Internet of Things, and smart home technologies, miniaturized and compact multi-antenna systems and multiple-input multiple-output (MIMO) antenna arrays have attracted increasing attention. Reducing the coupling between antenna elements is essential to improving the performance of such MIMO antenna system. In this work, we proposed a graphene-assembled, as an alternative material rather than metal, film-based MIMO antenna array with high isolation for 5G application. The isolation of the antenna element is improved by a graphene assembly film (GAF) frequency selective surface and isolation strip. It is shown that the GAF antenna element operated at 3.5 GHz has the realized gain of 2.87 dBi. The addition of the decoupling structure improves the isolation of the MIMO antenna array to more than 10 dB and corrects the antenna radiation pattern and operating frequency. The isolation between antenna elements with an interval of 0.4λ is above 25 dB. All experimental results show that the GAF antenna and decoupling structure are efficient devices for 5G mobile communication.

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A Compact Dual-Band and Dual-Polarized Millimeter-Wave Beam Scanning Antenna Array for 5G Mobile Terminals

IEEE Access ◽

10.1109/access.2021.3100933 ◽

2021 ◽

pp. 1-1

Author(s):

Yuqi He ◽

Sihan Lv ◽

Luyu Zhao ◽

Guan-Long Huang ◽

Xiaoming Chen ◽

...

Keyword(s):

Antenna Array ◽

Millimeter Wave ◽

Wave Beam ◽

Dual Band ◽

Mobile Terminals ◽

Beam Scanning ◽

Dual Polarized ◽

Scanning Antenna

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DESIGN OF A DUAL-BAND 12-ELEMENT MIMO ANTENNA ARRAY FOR 5G MOBILE APPLICATIONS

Progress In Electromagnetics Research Letters ◽

10.2528/pierl20102004 ◽

2021 ◽

Vol 95 ◽

pp. 73-81

Author(s):

Vishakha Thakur ◽

Naveen Jaglan ◽

Samir Dev Gupta

Keyword(s):

Antenna Array ◽

Mobile Applications ◽

Dual Band ◽

Mimo Antenna

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Design and Analysis of MIMO Dual Band Patch Antenna for 5G New Radio Applications in Mobile Terminals

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.36072 ◽

2021 ◽

Vol 9 (VI) ◽

pp. 5446-5451

Author(s):

Swati Dhandade

Keyword(s):

Mobile Communications ◽

Antenna Design ◽

Dual Band ◽

Slight Variation ◽

Band Frequency ◽

Mimo Antenna ◽

High Isolation ◽

New Radio ◽

Compact Size ◽

5G Mobile Communications

This paper presents a dual-band MIMO antenna design with compact size for 5G communication under 6 GHz band frequency. The metallic monopole stub structure is used to miniaturization of antenna. The L-shape monopole antenna is modified by adding semi-circular element in radiating structure of monopole to obtain dual-band resonance. The High isolation is achieved by employing T-shaped stub in ground plane.It has compact size is 45 mm × 25 mm × 1.6 mm3. The proposed Dual Band MIMO antenna has been design on FR4 material with ɛr = 4.4 with 1.6 thickness. The proposed antenna has 5G application in the bands of 2.5 GHz (2.34 GHz-2.62 GHz) and 3.5 GHz (3.20 GHz-5.20 GHz). The bandwidth of antenna getting 320MHz and 2500MHz at 2.5GHz and 3.5GHz respectively. The Isolation (S21) of proposed antenna is -31.2 dB at 2.5 GHz and -19.5 dB at 3.5 GHz. VSWR is less than 1.06 for both the bands. The designed dual band MIMO antenna covers 5G bands of 2.3-2.4GHz (n30/n40), 2.4-2.5GHz (n7/n38/n41/n90), and 3.2-5.2GHz (n77/n78/n80). The experimental and simulated results observed good matching except some slight variation. This proposed dual band MIMO antenna is suitable for 5G mobile Communications.

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A Compact Dual-Band and High-Isolation MIMO Antenna System for 5G Smartphone Applications

2020 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) ◽

10.1109/imws-amp49156.2020.9199661 ◽

2020 ◽

Author(s):

Xiao- Ting Yuan ◽

Zhe Chen ◽

Jin Li ◽

Tao Yuan

Keyword(s):

Antenna System ◽

Dual Band ◽

Smartphone Applications ◽

Mimo Antenna ◽

High Isolation

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

International Journal of Antennas and Propagation ◽

10.1155/2020/2965767 ◽

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.

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