A printed multiband MIMO antenna with decoupling element

Xu, Zheng; Zhang, Qisheng; Guo, Linyan

doi:10.1017/s1759078719000096

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…The size of the substrate was 120 × 76 mm 2 . The wavelength of the decoupling element was calculated using equation (45) [112]. where c is the speed of light and f is the frequency.…”

Section: Massive Mimo and Mutual Couplingmentioning

confidence: 99%

5G beamforming techniques for the coverage of intended directions in modern wireless communication: in-depth review

Rao¹,

Pant²,

Malviya³

et al. 2020

Int. J. Microw. Wireless Technol.

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The growing need of the compact and portable antennas with high speed and low latency wireless communication is the present and future demand of the voice over Internet protocol, on-demand bandwidth, and multimedia applications. Fifth-generation (5G) covers certain low-frequency bands under 6 GHz spectrum, and most of the high-frequency bands under 60 GHz. 5G is the part of the millimeter wave spectrum (30–300 GHz) and is introduced to overcome the problem of spectrum shortage due to exponential enhancement of wireless applications in industry, medical, airborne, radar, satellite, and research fields. The International Telecommunication Union's objective of wireless communications promises to provide higher data rates up to 10 Gbps for 5G mobile users and connectivity to the artificial intelligence devices, along with high spectral efficiencies and enhanced coverage. The users for the 5G require around 5 and 50 Gbps of data rates for low and high mobility, respectively. Beamforming in 5G is the modern powerful technique for the coverage of the intended user/direction using the narrow beam width radiation patterns. A brief survey on 5G beamforming techniques, i.e. analog, digital, hybrid, switched, and adaptive etc. and its types, working algorithms, design of compact antennas, gain, and size/type of the substrates is carried out in this paper. The study of the hybrid coupler, branchline coupler, Wilkinson power divider, and Butler matrix in beamforming is required for 5G smart antennas. Different beam widths like ±15, ±35, ±45, and ±55° etc. are produced for the intended directions using a variety of beamforming techniques. From lower to higher frequency band beamforming applications with Roger's Duroid 4003/4350/5880, tectonic, and aluminum oxide dielectric substrates are discussed here. Various beamforming techniques with their merits, demerits, and applications are included in the paper for the knowledge extension of the beamforming antenna designers and research community.

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“…The size of the substrate was 120 × 76 mm 2 . The wavelength of the decoupling element was calculated using equation (45) [112]. where c is the speed of light and f is the frequency.…”

Section: Massive Mimo and Mutual Couplingmentioning

confidence: 99%

5G beamforming techniques for the coverage of intended directions in modern wireless communication: in-depth review

Rao¹,

Pant²,

Malviya³

et al. 2020

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

show abstract

“…For optimal diversity performance, these antennas should also have compact sizes and low mutual coupling. Many techniques [9][10][11][12][13][14][15][16][17][18] have been used to lessen the impact of mutual coupling in millimetre-wave MIMO. New research in the field of 5G millimetre waves demonstrates a focus on wideband and multiband MIMO antennas [19].…”

Section: Introductionmentioning

confidence: 99%

Metamaterial Inspired Quad-port Multi-Antenna System for Millimeter Wave 5G Applications

Krishnamoorthy¹,

Kumar

GundalaSwathi

et al. 2023

Preprint

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This work presents a symmetrical quad-element Multiple-Input Multiple-Output (MIMO) antenna that uses a feasible band for 5G millimetre waves at 38 GHz. The main radiator is a patch antenna with a rectangular shape, and the frequency it operates at is 38 GHz. Etching a three-element split-ring resonator (SRR) metamaterial unit cell onto the normal patch radiator allows for widening the resonance over the desired operating band. The suggested MIMO antenna is built on a Rogers RT5880 substrate material that measures 15 x 15 mm2, has a thickness of 0.8 mm, and has a dielectric constant of 2.2. The results of the measurements show that the antenna is capable of covering a frequency range from 37.3 to 39.3 GHz and can also achieve an inter-port isolation of greater than 20 dB between the antenna elements across both bands without the use of a complex decoupling structure. These are the results that were obtained when the antenna was tested. An equivalent circuit diagram of the electrical responses of the antenna is also presented to get insight into the proposed antenna. This schematic makes use of lumped components. The diversity performance parameters that were analysed provide an envelope correlation coefficient that is less than 0.005, and a channel capacity loss that is less than 0.35 bits/s/Hz. All of these results fall well within the parameters that are considered acceptable norms. The findings provide evidence that the design is workable for the transmission of millimetre waves at 5G speeds.

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“…In addition, such antennas should have small dimensions and minimal mutual coupling for better diversity performance. Numerous methods have been implemented for mutual coupling reduction in millimeterwave MIMO [9]- [18].…”

Section: Introductionmentioning

confidence: 99%

A Compact Planar Four-port MIMO Antenna for 28/38 GHz Millimeter-wave 5G Applications

Tadesse

Acharya

Sahu

2022

AEM

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This article presents a planar four-port microstrip line-fed Multiple-Input Multiple-Output (MIMO) antenna operating at 5G millimeter-wave candidate bands of 28 GHz and 38 GHz. A rectangular-shaped patch antenna is designed as a main radiator to obtain a resonance at 28 GHz. Etching of a single-element split-ring resonator (SRR) metamaterial unit cell from the basic patch radiator introduces an additional resonance band at 38 GHz. The suggested MIMO antenna is built on Rogers RT5880 substrate material with a dimension of 14 mm × 14 mm, a thickness of 0.8 mm, and a relative permittivity of 2.2.The measured results show that the antenna achieves bandwidths of 26.6-29 GHz and 37.3-39.3 GHz, whereas greater than 25 dB of port isolation between antenna elements over both bands is obtained without applying any complex decoupling structure. The antenna’s equivalent circuit diagram is presented with the help of lumped elements to characterize its electrical responses. The investigated diversity performance parameters, which result in an envelope correlation coefficient below 0.005, diversity gain of almost 10 dB, and channel capacity loss of less than 0.35 bits/s/Hz, are all found within their conventional limits. The findings show the viability of the design for millimeter-wave 5G applications.

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A printed multiband MIMO antenna with decoupling element

Cited by 11 publications

References 16 publications

5G beamforming techniques for the coverage of intended directions in modern wireless communication: in-depth review

5G beamforming techniques for the coverage of intended directions in modern wireless communication: in-depth review

Metamaterial Inspired Quad-port Multi-Antenna System for Millimeter Wave 5G Applications

A Compact Planar Four-port MIMO Antenna for 28/38 GHz Millimeter-wave 5G Applications

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