Mutual Coupling Reduction Using Ground Stub and EBG in a Compact Wideband MIMO-Antenna

Khan, Awais; Bashir, Shahid; Ghafoor, Salman; Qureshi, Khurram Karim

doi:10.1109/access.2021.3065441

Cited by 71 publications

(48 citation statements)

References 29 publications

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“…However, this design has large dimensions and a lower operating frequency, as well as a complicated design structure. Electromagnetic bandgap (EBG) and ground stub were incorporated into the proposed 2-port wideband MIMO antenna to increase the isolation of MIMO components 30 . The designed antenna offers good MIMO diversity performance and excellent isolation between two MIMO antennas but only has two MIMO components with low gain.…”

Section: Introductionmentioning

confidence: 99%

Gain and isolation enhancement of a wideband MIMO antenna using metasurface for 5G sub-6 GHz communication systems

Hasan

Islam

Samsuzzaman

et al. 2022

Sci Rep

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This work proposes a compact metasurface (MS)-integrated wideband multiple-input multiple-output (MIMO) antenna for fifth generation (5G) sub-6 GHz wireless communication systems. The perceptible novelty of the proposed MIMO system is its wide operating bandwidth, high gain, lower interelement gap, and excellent isolation within the MIMO components. The radiating patch of the antenna is truncated diagonally with a partially ground plane, and a metasurface has been employed for enhancing the antenna performance. The suggested MS integrated single antenna prototype has a miniature dimension of 0.58λ × 0.58λ × 0.02λ. The simulated and measured findings demonstrate a wideband characteristic starting from 3.11 to 7.67 GHz including a high realized gain of 8 dBi. The four-element MIMO system has been designed by rendering each single antenna orthogonally to one another while retaining compact size and wideband properties between 3.2 and 7.6 GHz. The suggested MIMO prototype has been designed and fabricated on a low loss Rogers RT5880 substrate with a miniature dimension of 1.05λ × 1.05λ × 0.02λ and its performance is evaluated using a suggested 10 × 10 array of a square enclosed circular split ring resonators within the same substrate material. The inclusion of the proposed metasurface with a backplane significantly reduces antenna backward radiation and manipulates the electromagnetic field, thus improving the bandwidth, gain and isolation of MIMO components. The suggested 4-port MIMO antenna offers a high realized gain of 8.3 dBi compared to existing MIMO antennas with an excellent average total efficiency of 82% in the 5G sub-6 GHz spectrum and is in good accordance with measured results. Furthermore, the developed MIMO antenna exhibits outstanding diversity characteristics in respect of envelope correlation coefficient (ECC) less than 0.004, diversity gain (DG) close to 10 dB (> 9.98 dB) and high isolation between MIMO components (> 15.5 dB). Therefore, the proposed MS-inspired MIMO antenna substantiates its applicability for 5G sub-6 GHz communication networks.

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Section: Introductionmentioning

confidence: 99%

Gain and isolation enhancement of a wideband MIMO antenna using metasurface for 5G sub-6 GHz communication systems

Hasan

Islam

Samsuzzaman

et al. 2022

Sci Rep

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“…Figure 1 depicts the topology of the proposed dual-port, flower-shaped UWB-MIMO antenna system, and Figure 2 shows the fabricated prototype. Compared with the antennas reported in [3,6,8,9,11,12,14], the MIMO antenna system proposed in this study has a smaller size of 30 × 18 mm 2 (0.84λ × 0.50λ), and was designed on an FR4 substrate with 1.6 mm thickness (tanδ = 0.02 and εr = 4.4). Two similar flower-shaped radiating elements and a metal ground make up the overall antenna model.…”

Section: Antenna Geometrymentioning

confidence: 99%

“…In [7], sound isolation between antenna components was available throughout the UWB by adding a vertical stub and an H-slot in the ground plane. In [8], the combination of the ground stub on the bottom layer and the EBG structure between the two rectangular patches on the top layer led to a remarkably low mutual coupling between the two radiating patches. This antenna design possessed a compact size of 26 × 31 mm 2 and displayed a frequency range of 3.1-11 GHz.…”

Section: Introductionmentioning

confidence: 99%

A Flower-Shaped Miniaturized UWB-MIMO Antenna with High Isolation

Han

Wang

et al. 2022

Electronics

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An ultra-wideband (UWB) multiple-input, multiple-output (MIMO) antenna with a reasonably compact size of 30 × 18 × 1.6 mm3 is presented in this paper. The proposed antenna contains two radiating components, each of which is made up of three elliptically shaped patches situated 60 degrees apart, and resembles the shape of a flower. Moreover, the proposed antenna design incorporates a T-like ground branch that functions as a decoupling structure, and is composed of two modified inverted-L branches and an I-shaped stub, offering an isolation of more than 20 dB over the whole operation band (4.3–15.63 GHz). Furthermore, the proposed antenna system was fabricated and tested, and the envelope correlation coefficient (ECC), diversity gain (DG), and total active reflection coefficient (TARC), as well as the radiation characteristics and MIMO performance, were analyzed. The proposed UWB-MIMO antenna may be a suitable candidate for diverse UWB applications, based on the simulated and measured results of this study.

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“…CCL with a lower value is better. To achieve superior MIMO diversity performance, the CCL value can be calculated using equation (13), and it must be less than 0.1(bits/s/Hz) [21]. Figure 24 illustrates the calculated channel capacity loss for the full operating band, which is significantly below 0.1(bits/s/Hz).…”

Section: Diversity Gain (Dg)mentioning

confidence: 99%

Dual-Polarized MIMO Antenna System for 5G Indoor base Station Applications

Surendra

khan

2022

Preprint

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In this paper a dual-polarized multiple-input multiple-output (MIMO) antenna system for fifth-generation (5G) indoor base station applications resonating at 3.5 GHz has been proposed. The initial design is a conventional patch antenna, and characteristic mode analysis (CMA) is used to determine its dual-polarized characteristics. Both orthogonal modes are excited using the full-wave approach with a 50 Ohm dual-port coaxial feed line, and operated at 3.5 GHz. The non-contact feed method is used to improve isolation between ports. Inserting an air gap between the antenna substrate and the ground metal sheet improves gain and bandwidth. Further 2x2 MIMO antenna with 8-port is designed on low cost FR4 dielectric material with 120*120*5.17 mm3 compact volume. The MIMO antenna’s performance are examined by simulation and experimental. For the proposed MIMO, high isolation, high efficiency, and appropriate gain-level characteristics have been obtained. Furthermore, throughout the whole band of interest, the calculated total active reflection coefficient (TARC) and envelope correlation coefficient (ECC) of the antenna components are very low, indicating that the proposed multi-antenna systems are capable of enormous MIMO and diversity applications. Furthermore, the antenna avoids the use of complex feeding mechanisms such as baluns or directional couplers.

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Mutual Coupling Reduction Using Ground Stub and EBG in a Compact Wideband MIMO-Antenna

Abstract: Khurram Karim Qureshi would like to acknowledge the support provided by the deanship of research at King Fahd University of Petroleum and Minerals (KFUPM) through project no. SB181022.

Cited by 71 publications

References 29 publications

Gain and isolation enhancement of a wideband MIMO antenna using metasurface for 5G sub-6 GHz communication systems

Gain and isolation enhancement of a wideband MIMO antenna using metasurface for 5G sub-6 GHz communication systems

A Flower-Shaped Miniaturized UWB-MIMO Antenna with High Isolation

Dual-Polarized MIMO Antenna System for 5G Indoor base Station Applications

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