Dual‐polarized textile‐based two/four element
            <scp>MIMO</scp>
            antenna with improved isolation for dual wideband application

Roy, Sourav; Ghosh, Soumendu; Pattanayak, Soumya Sundar; Chakarborty, Ujjal

doi:10.1002/mmce.22292

Cited by 30 publications

(30 citation statements)

References 18 publications

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“…In 17 , 18 , a 2 ports MIMO antenna printed on a rigid FR-4 substrate with a large size operating at the UWB frequency band is discussed and investigated. A dual wideband 4 ports MIMO antenna operated from 1.5 to 3.8 GHz and from 4.1 to 6.1 GHz placed on jeans flexible substrate and produced high isolation by presenting meandered line decoupling structure between antenna elements is discussed in 19 . In 20 , a 4 ports monopole antenna was placed on a flexible Rogers's substrate operating from 3.2 to 14 GHz and producing isolation and peak gain higher than 22 dB and 4.5 dBi.…”

Section: Introductionmentioning

confidence: 99%

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

Ibrahim

Ahmed

2022

Sci Rep

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A flexible quad-port MIMO antenna with good isolation features with both flat and bending configurations is presented and investigated in this work. The single unit of the MIMO is composed of a crescent-shaped monopole antenna connected with a curved coplanar waveguide (CPW) fed to enhance the operating bandwidth. A thin and flexible Roger 3003 material with thickness = 0.13 mm, εr = 3, and tan δ = 0.001 is used. To improve the isolation between ports which in turn improves the performance of the MIMO system, the single unit antenna is repeated four times and placed orthogonal to each other. A 54 mm × 54 mm × 0.13 mm (0.63λo × 0.63λo × 0.0015λo @ 3.5 GHz) is the total size of the quad ports MIMO antenna. The flexible MIMO antennas in both flat and bending layouts are simulated, tested and the outcomes achieved S11 < − 10 dB from 3.5 GHz up to 11 GHz with mutual coupling ≤ − 17 dB between ports. The radiation patterns of the MIMO antenna are tested with 5 dB peak gain and with semi-omnidirectional and bidirectional patterns in both two planes. The Diversity Gain (DG) values ≥ 9.9 dB through the designed working band, Envelop Correlation Coefficient (ECC) lower than 0.03 from 3.5 GHz to 4 GHz and lower than 0.01 from 4 to 11 GHz, and Channel Capacity Loss (CCL) value ≤ 0.5 bit/s/Hz over the worked band are calculated and extracted in flat and bending configurations and achieved suitable values which support the suggested antenna in the UWB flexible networks.

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Section: Introductionmentioning

confidence: 99%

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

Ibrahim

Ahmed

2022

Sci Rep

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“…The antenna with self‐isolated property in Reference 8 can achieve a good isolation by itself, and there is no need for any additional isolation elements or decoupling techniques. Antenna elements with different shapes are presented to increase the isolation, such as T‐shaped decoupling stub, 9 U‐shaped grounded slot, 10 and a ground shorted meandered line 11 . In Reference 12, a decoupling technique based on a closed‐decoupling‐loop which works as a half‐wavelength loop‐type resonator leads to a good isolation even when the antenna elements are very close.…”

Section: Introductionmentioning

confidence: 99%

“…Antenna elements with different shapes are presented to increase the isolation, such as T-shaped decoupling stub, 9 U-shaped grounded slot, 10 and a ground shorted meandered line. 11 In Reference 12, a decoupling technique based on a closed-decoupling-loop which works as a half-wavelength loop-type resonator leads to a good isolation even when the antenna elements are very close. The isolation can also be enhanced by using the defected ground planes, 13,14 neutralization line (NL) structure, 15 electromagnetic band-gap (EBG), 16 and metamaterials.…”

Section: Introductionmentioning

confidence: 99%

A compact planar dual band two‐port MIMO antenna with high isolation and efficiency

Dong

Huang

Chen

et al. 2022

Int J RF Mic Comp-Aid Eng

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A dual-band two-port MIMO antenna with high isolation and efficiency is proposed in this article. Each antenna element is composed of a rotated U-shaped strip and an L-shaped strip. The MIMO antenna is optimized to operate in 2.5-2.7 GHz and 4.8-5 GHz, which can cover the 5G bands of China Mobile. The defected ground structure consists of a slant square loop with a T-shaped slit and a U-shaped slot. A rectangle parasitic strip is placed in the U-shaped slot. The use of defected ground structure and parasitic strip makes the antenna obtain good isolation which is better than À17.96 dB and À 20.1 dB at the lower and higher frequency bands. To evaluate the antenna diversity, envelope correlation coefficient (ECC) is analyzed which is lower than 0.0006 and 0.12 at the lower and higher frequency bands, respectively. The measured gains are 4.35 dBi and 4.6 dBi, while the measured efficiencies are 63.23% and 68.69% at 2.6 GHz and 4.9 GHz, respectively. The prototype of antenna is fabricated to verify the functioning of proposed antenna design.

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“…To improve the isolation between antenna elements in MIMO system, tremendous research efforts have been devoted in recent years. 4 Some researches include neutralization line between two coupled antennas, 5,6 parasitic element, 7,8 electromagnetic band gap (EBG) structure, 9 defected ground structure (DGS) [10][11][12] , ground decoupling branches, 13,14 and polarization diversity structure. 15,16 Most of the above designs require the introduction of additional decoupling structures between the coupled antennas.…”

Section: Introductionmentioning

confidence: 99%

A wideband self‐decoupled multi‐input multi‐output antenna with a high isolation

Lü

Zhang

Cao

et al. 2022

Int J RF Mic Comp-Aid Eng

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A wideband MIMO antenna, which consists of two adjacent antenna elements with a very close distance (2 mm or 0.026λ), is suggested to achieve a good isolation by the principle of common mode (CM, in‐phase signals) and differential mode (DM, out‐of‐phase signals) cancelation without using any additional decoupling structure in this article. Compared with its reference design, the measured results demonstrate that the isolation of proposed design can be improved to better than 20 dB in a wider bandwidth of 3.2–5.9 GHz (59%), with S11 and S22 < −10 dB. The experimental efficiency and envelope correlation coefficients are larger than 78% and <0.04 for the proposed design, respectively. The proposed multiple‐input multiple‐output (MIMO) antenna array, with good isolation and diversity performance, exhibits broad application prospects in the tightly arranged MIMO antennas of 5G mobile devices.

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Dual‐polarized textile‐based two/four element MIMO antenna with improved isolation for dual wideband application

Cited by 30 publications

References 18 publications

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

A compact planar dual band two‐port MIMO antenna with high isolation and efficiency

A wideband self‐decoupled multi‐input multi‐output antenna with a high isolation

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