Isolation Improvement of MIMO Antenna Using a Novel Flower Shaped Metamaterial Absorber at 5.5 GHz WiMAX Band

Garg, Priyanka; Jain, Priyanka

doi:10.1109/tcsii.2019.2925148

Cited by 107 publications

(70 citation statements)

References 20 publications

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“…15(a). The CCL and TARC of the proposed MIMO antenna system in both configurations is calculated by using the equation (12) and (13). Simulated and measured CCL and TARC is portrayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, a correlation coefficient of less than 0.02 and mutual coupling less than −25 dB is realized for the proposed MIMO antenna configuration. A dual-port microstrip patch antenna with a flower-shaped metamaterial structure is proposed in [12]. The flower-shaped metamaterial decoupling structure provides isolation of about 30 dB, TARC < −12 dB and peak gain of 5 dBi for the WiMAX frequency band.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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In this article, a low-cost 16-port non-planar Multiple-Input-Multiple Output (MIMO) antenna system is proposed for future 5G applications. The non-planar MIMO antenna system is established around a 3D-octagonal-shape polystyrene block. The MIMO elements are arranged on the eight-sides of octagonalshape block, whereas bottom and top faces of polystyrene block are left void. The single antenna element comprises of slotted microstrip patch with a stepped chamfered feed line and defected ground plane. Each MIMO element is designed on FR-4 substrate with a size of 22 mm × 20 mm, to cover the frequency band of 3.35 GHz to 3.65 GHz for the fifth-generation (5G) applications. The isolation between array elements is improved by using a meander-lines based near-zero-index epsilon-negative (NZI-ENG) metamaterial decoupling structure. The array elements are placed on the top-layer, whereas common connected ground plane and decoupling structure is placed on the bottom-layer. The metamaterial-based decoupling structure offers an isolation of more than 28 dB for antenna elements arranged in across and side-by-side configuration. Moreover, simulated and measured MIMO performance parameters i.e. Total Active Reflection Coefficient (TARC) < −18 dB, Envelop correlation coefficient (ECC) < 0.1 and Channel capacity loss (CCL) < 0.3 are in acceptable limits. The proposed non-planar 3D-MIMO antenna system can be employed for indoor localization systems and wireless personal area network applications, where different 5G devices are wirelessly linked to a centralized server. Moreover, a good agreement between simulated and measured results is achieved for the non-planar MIMO antenna system. INDEX TERMS Antenna, channel capacity loss (CCL), common ground plane, envelope correlation coefficient (ECC), fifth-generation (5G), epsilon negative metamaterial (ENG-MTM), multiple-input-multipleoutput (MIMO).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…The ECC of the antenna is an important parameter to assess its suitability in MIMO communications and should be preferably

< 0.2

[32]. Since the efficiency of the antenna is

> 50 %

, the ECC can be computed using the technique given in [33–35]. The plots of ECC with respect to frequency for two different cases – (i) without the DGS in the ground plane and (ii) with the DGS, are given in Fig.…”

Section: Resultsmentioning

confidence: 99%

High port‐to‐port isolation dual circularly polarised microstrip patch antenna with multifunction DGS

Chaudhuri

Mishra

Kshetrimayum

et al. 2020

IET Microwaves, Antennas & Propagation

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“…As a consequence, the incident EM wave through the absorber will suffer from the negative value of the refractive index [2]; which traps the incident EM wave inside the absorber. A lot of work is underway to develop perfect MM absorbers to perform for different applications like absorber integrated with antennae for noise reduction [3], remote sensing applications [4], microwave imaging [5], stealth technologies especially for military vehicles [6], reducing radar cross-sections [7,8], invisibility cloaking [9] and SAR reduction [10,11]. Generally, a specially designed precise patch or an array of patches on one side of a dielectric substrate and a ground of the same material of the patch set at the other side of the substrate is used for MM absorber design [12].…”

Section: Introductionmentioning

confidence: 99%

Modified-Segmented Split-Ring Based Polarization and Angle-Insensitive Multi-Band Metamaterial Absorber for X, Ku and K Band Applications

et al. 2020

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A novel modified-segmented split-ring based symmetric metamaterial absorber is introduced in this paper for X, Ku, and K band applications. The perfect absorption was achieved with a total of 1.91 GHz absorption bandwidth using the conventional FR4 substrate without resistive lumped elements. EM waves were applied in TEM mode at both normal and oblique incidence up to 90° and the same absorptance was found at 11.23 GHz, 14.18 GHz, 17.37 GHz, and 19.18 GHz with the maximum of 85.51%, 99.13%, 98.19%, and 90.8% absorptance respectively. This absorption performance was proved for both co-and crosspolarization analysis. Double negative values of permittivity and permeability up to 17.37 GHz and single negative values of either permittivity or permeability at 19.18 GHz were achieved. An equivalent circuit analysis also proved its performance capability, which makes it a perfect metamaterial absorber. Finally, the comparison of the design with recently published works in terms of unit cell size, absorption band, maximum polarization angles, and cross-polarized absorptivity proved it as a better candidate for the potential use as a perfect absorber. INDEX TERMS Wideband, metamaterial absorber, modified segmented split-ring, X Ku and K band, triple band.

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Isolation Improvement of MIMO Antenna Using a Novel Flower Shaped Metamaterial Absorber at 5.5 GHz WiMAX Band

Cited by 107 publications

References 20 publications

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

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

High port‐to‐port isolation dual circularly polarised microstrip patch antenna with multifunction DGS

Modified-Segmented Split-Ring Based Polarization and Angle-Insensitive Multi-Band Metamaterial Absorber for X, Ku and K Band Applications

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