16-Port Non-Planar MIMO Antenna System With Near-Zero-Index (NZI) Metamaterial Decoupling Structure for 5G Applications

Shabbir, Tayyab; Islam, Mohammad Tariqul; Al‐Bawri, Samir Salem; Aldhaheri, Rabah W.; Alharbi, Khalid; Aljohani, Abdulah Jeza; Saleem, Rashid

doi:10.1109/access.2020.3020282

Cited by 34 publications

(26 citation statements)

References 35 publications

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“…The performance of the mm-Wave two-port MIMO antenna systems evaluated by TARC, ECC, and CCL. These performance parameters are extracted by using the Equations (1) for ECC, (2 and 3 ) for CCL and TARC [30]. In mm-wave applications, the values of TARC, CCL, and ECC should be lower than 0 dB, 0.5 bits/s/Hz, and 0.5, respectively, for an efficient system of MIMO antenna [30][31][32].…”

Section: Resultsmentioning

confidence: 99%

Hexagonal Shaped Near Zero Index (NZI) Metamaterial Based MIMO Antenna for Millimeter-Wave Application

et al. 2020

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A single-layered multiple-input multiple-output (MIMO) antenna working at 28 GHz loaded with a compact planar-patterned metamaterial (MTM) structures is presented in this paper for millimeterwave application. A combination of a split square and hexagonal shaped unit cell is designed and investigated with a wide range of effective near-zero index (NZI) of permeability and permittivity, along with a refractive index (NZRI) property. The metamaterial characteristics were examined through the material wave propagation in two main directions at y and x-axis. For wave propagation at the y-axis, it demonstrates munear-zero (MNZ) with more than 6 GHz bandwidth, near-zero refractive index (NZRI), and epsilon-near-zero (ENZ) properties. However, it indicates a wide negative range of single mu metamaterial (MNG) from 27.6 to 28.9 GHz frequency span at x-axis wave propagation. A single antenna with 3×3 metamaterial unit cells is proposed to operate at a frequency band (24 -30) GHz. Furthermore, MIMO antenna with only 4 mm space between antenna elements provides high isolation of more than 24 dB. The measured results show that the MIMO antenna is satisfied with 6 GHZ bandwidth, and maximum peak gain of 12.4 dBi. In addition to that, the proposed MIMO antenna loaded with MTM has also shown good performances with high diversity gain (DG > 9.99), envelope correlation coefficient (ECC) lower than 0.0013, channel capacity loss (CCL) < 0.42, total active reflection coefficient (TARC) < −7 dB, total efficiencies of higher than 98%, with an overall antenna size of 52 mm × 23 mm. INDEX TERMSMillimeter-wave (mm-wave), antenna array, metamaterial (MTM), high isolation, nearzero index (NZI) metamaterial, envelope correlation coefficient, high gain

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Section: Resultsmentioning

confidence: 99%

Hexagonal Shaped Near Zero Index (NZI) Metamaterial Based MIMO Antenna for Millimeter-Wave Application

et al. 2020

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“…7 for the unit cell of the MTM along with 1 × 2, 2 × 2, and 2 × 2 arrays conditions. Prior to the analysis of the MTM effective parameters, stopband behaviour was first investigated to enable the proposed MTM to be operated in different microwave applications [16,38]. From the Sparameters, it could be observed that the stopbands are created when the S 21 results are below −10 dB, and the S 11 results are near to zero.…”

Section: Modelling and Simulationmentioning

confidence: 99%

Decagonal C-Shaped CSRR Textile-Based Metamaterial for Microwave Applications

Jin¹,

Zhang²,

Yao³

et al. 2022

Computers, Materials &Amp; Continua

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This paper introduces a decagonal C-shaped complementary splitring resonator (CSRR) textile-based metamaterial (MTM). The overall size of the proposed sub-wavelength MTM unit cell is 0.28λ 0 × 0.255λ 0 at 3 GHz. Its stopband behaviour was first studied prior analysing the negative index properties of the proposed MTM. It is worth noting that in this work a unique way the experiments were completed. For both simulations and measurements, the proposed MTM exhibited negative-permittivity and negative-refractive index characteristics with an average bandwidth of more than 3 GHz (considering 1.7 to 8.2 GHz as the measurements were carried out within this range). In simulations, the MTM exhibited negative-permittivity properties within the range of 1.7 to 7.52 GHz and 7.96 to 8.2 GHz; and negative-refractive index from 1.7 to 2.23 GHz and 2.33 to 5.09 GHz and 5.63 to 7.45 GHz. When measured from 1.7 to 8.2 GHz, negative-permittivity and negative-refractive index characteristics are exhibited throughout an average bandwidth of more than 3 GHz. Similarly, the transmission coefficient attained in simulations and measurements indicated about 3 GHz of bandwidth, from 1.7 to 3.88 GHz and from 6.68 to 7.4 GHz. The satisfactory agreement between simulations and experiments indicates the potential of the proposed MTM for microwave applications.

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“…Negative permeability, permittivity and refractive index are some exclusive properties of the metamaterial that can be used for various applications in communication systems of microwave frequencies. Antenna performance improvement 1 – 3 , radiation reduction 4 , 5 , design of absorber 6 , 7 , sensors 8 , 9 , high-frequency communications 10 , 11 , solar energy harvesting 12 , 13 , electromagnetic shielding 14 , metamaterial lenses 15 , etc. are some prominent applications of the metamaterial.…”

Section: Introductionmentioning

confidence: 99%

Gap coupled symmetric split ring resonator based near zero index ENG metamaterial for gain improvement of monopole antenna

Moniruzzaman

Islam

Samsuzzaman

et al. 2022

Sci Rep

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In this article, a symmetric split ring resonator (SRR) based metamaterial (MTM) is presented that exhibits three resonances of transmission coefficient (S21) covering S, C, and X-bands with epsilon negative (ENG) and near zero index properties. The proposed MTM is designed on an FR4 substrate with the copper resonator at one side formed with two square rings and one circular split ring. The two square rings are coupled together around the split gap of the outer ring, whereas two split semicircles are also coupled together near the split gaps. Thus, gap coupled symmetric SRR is formed, which helps to obtain resonances at 2.78 GHz, 7.7 GHz and 10.16 GHz with desired properties of the MTM unit cell. The MTM unit cell's symmetric nature helps reduce the mutual coupling effect among the array elements. Thus, different array of unit cells provides a similar response to the unit cell compared with numerical simulation performed in CST microwave studio and validated by measurement. The equivalent circuit is modelled for the proposed MTM unit cell in Advanced Design System (ADS) software, and circuit validation is accomplished by comparing S21 obtained in ADS with the same of CST. The effective medium ratio (EMR) of 10.7 indicates the compactness of the proposed MTM. A test antenna is designed to observe the effect of the MTM over it. Numerical analysis shows that the proposed MTM have an impact on the antenna when it is used as the superstrate and helps to increase the gain of the antenna by 95% with increased directivity. Thus, compact size, high EMR, negative permittivity, near zero permeability and refractive index makes this MTM suitable for S, C and X band applications, especially for antenna gain with directivity enhancement.

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16-Port Non-Planar MIMO Antenna System With Near-Zero-Index (NZI) Metamaterial Decoupling Structure for 5G Applications

Cited by 34 publications

References 35 publications

Hexagonal Shaped Near Zero Index (NZI) Metamaterial Based MIMO Antenna for Millimeter-Wave Application

Hexagonal Shaped Near Zero Index (NZI) Metamaterial Based MIMO Antenna for Millimeter-Wave Application

Decagonal C-Shaped CSRR Textile-Based Metamaterial for Microwave Applications

Gap coupled symmetric split ring resonator based near zero index ENG metamaterial for gain improvement of monopole antenna

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