A Low Mutual Coupling Design for Array Microstrip Antennas Integrated with Electromagnetic Band-Gap Structures

Kaabal, Abdelmoumen; Halaoui, Mustapha El; Ahyoud, Saida; Asselman, Adel

doi:10.1016/j.protcy.2016.01.115

Cited by 20 publications

(13 citation statements)

References 10 publications

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“…When antenna elements are placed in a limited space, mutual coupling between the adjacent ports is another significant figure of merit for a MIMO antenna. In [9], [10], EBG structures were utilized to improve port isolation by virtue of band gap characteristic. However, to obtain low mutual coupling, these EBG structures often need a larger space to form the periodic arrangement, which is not beneficial to the miniaturization design of MIMO antennas for mobile terminals.…”

Section: Introductionmentioning

confidence: 99%

A Low Correlation and Mutual Coupling MIMO Antenna

Liu

Jia

et al. 2019

IEEE Access

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A new two-element multiple-input multiple-output (MIMO) antenna with low correlation and high port isolation is presented. First, two hybrid electromagnetic band gap (EBG) structures with the ability to support and stop surface wave propagation, respectively, are utilized simultaneously for achieving an extremely low envelope correlation coefficient (ECC). Then, based on studying of the ground current of the MIMO antenna with EBG structure, a new defected ground structure (DGS) is used to reduce the mutual coupling by controlling the polarization of the coupling field. The two antenna elements have an edge to edge spacing of 0.13λ where λ is the free space wavelength at the resonant frequency. Finally, the rectangular slots are introduced to the patch to improve the cross polarization. Experimental results show that the ECC of the MIMO antenna is lower than 0.002. Furthermore, the maximum mutual coupling (MC) reduction of 22dB can be achieved within the working bandwidth. All of above make the MIMO antenna a potential candidate for mobile terminal-based MIMO antenna systems. INDEX TERMS Multiple-input multiple-output (MIMO) antenna, envelope correlation coefficient (ECC), defected ground structure (DGS), electromagnetic band gap (EBG).

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Section: Introductionmentioning

confidence: 99%

A Low Correlation and Mutual Coupling MIMO Antenna

Liu

Jia

et al. 2019

IEEE Access

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“…A comparison among the reported antennas and this study is summarized in Table 4, in term of antenna dimensions, metamatrials type, number of the operating band, separation distance, and the maximum isolation between the antenna elements. From Table 4, it is proven that compared to all published results, the proposed antenna array with EBG structure exhibits relatively excellent isolation with respect to the antenna array in comparison to other published results [5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Envelope Correlation Coefficientmentioning

confidence: 84%

“…From the simulated S-parameters, ECC can be calculated by using the formula described in Eq. (1) [14].…”

Section: Envelope Correlation Coefficientmentioning

confidence: 99%

“…A periodic array of mushroom like EBG structure is implemented with microstrip antennas was reported in [13] to achieve mutual coupling reduction. To reduce the surface wave excitation in printed rectangular patch antenna the authors in [14] investigated mushroom like EBG structure to mitigate the mutual coupling between the radiating antenna elements. A suspended metasurface composed periodic square SRR was applied above the antenna array in [15] for mutual coupling reduction, the proposed metasurface has the ability to reject the unwanted radiation as well as reducing mutual coupling in array antenna.…”

Section: Introductionmentioning

confidence: 99%

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Mutual Coupling Reduction in Patch Antenna Array Based on EBG Structure for MIMO Applications

Alnaiemy

Elwi

Nagy

2019

Period. Polytech. Elec. Eng. Comp. Sci.

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This paper presents a printed rectangular slot microstrip antenna array of two elements based on an Electromagnetic Band Gap (EBG) structure. The proposed EBG structure is invented to improve the isolation between the radiating elements for multiple-input multiple-output (MIMO) application. Single and two slotted rectangular microstrip antennas are designed on an FR-4 substrate with a dielectric constant (εr) of 4.3 and loss tangent (tanδ) of 0.025 with thickness of 1.6 mm. The proposed EBG structure is designed as one planar row of 24 slots. The proposed array performance is tested numerically using Computer Simulation Technology Microwave Studio (CSTMW) of Finite Integration Technique (FIT) formulations. The antenna performance in terms of reflection coefficient (S11), isolation coefficient (S21), radiation patterns, boresight gain and Envelope Correlation Coefficient (ECC) are investigated before and after introducing the EBG structure to identify the significant enhancements. The proposed EBG structure is located between the radiating antenna elements to reduce the mutual coupling of the proposed antenna array. The edge to edge separation distance of the proposed antennas is λ0/16, where the λ0 is the free space wavelength at 2.45 GHz. The simulated results show a significant isolation enhancement from –6 dB to –29 dB at the first resonant frequency 2.45 GHz and from –10 dB to –25 dB at the second resonant frequency 5.8 GHz after introducing the EBG structure to the antenna array.

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“…When the antenna elements are placed closer than half a wavelength, the appearance of strong coupling between antennas degrades the efficiency of the system . Some decoupling approaches are based on the efficiency improvement of electromagnetic bandgap (EBG) structures to eliminate surface waves in printed antenna geometries, applying multilayer EBGs between two omnidirectional discone antennas as absorbers, defected ground structures (DGS) to reduce mutual coupling between DRAs and microstrip patch antennas (MPAs), superstrate constructed from hexagonal slit resonators between circular patch antennas and substrate integrated waveguide technology in dual‐polarized microstrip antennas…”

Section: Introductionmentioning

confidence: 99%

Isolation enhancement of rectangular dielectric resonator antennas using wideband double slit complementary split ring resonators

Rezapour

Rashed-Mohassel

Keshtkar

et al. 2019

Int J RF Microw Comput Aided Eng

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A wideband epsilon-negative structure is employed as one-layer and two-layer isolators to reduce mutual coupling in multiple-input multiple-output systems composed of two E-coupled rectangular dielectric resonator antennas. The proposed unit cell with −15 dB bandwidth for S 21 extending from 1970 to 3317 MHz, is a double slit complementary split ring resonator etched on the ground plane of a stripline. Each layer is composed of a 2 × 3 array of the suggested unit cell. Reduction in isolation of more than 11 dB for the one-layer case and higher than 20 dB for the two-layer case are measured within the frequency range of 2.604 to 2.64 GHz which includes WiMAX. The highest isolation level of 36 dB is realized at 2.868 GHz. The impedance matching, gain, radiation efficiency, and envelope correlation are improved compared to the original case. A prototype is designed, fabricated, and tested. Simulation data and measurement results are in good agreement.

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A Low Mutual Coupling Design for Array Microstrip Antennas Integrated with Electromagnetic Band-Gap Structures

Cited by 20 publications

References 10 publications

A Low Correlation and Mutual Coupling MIMO Antenna

A Low Correlation and Mutual Coupling MIMO Antenna

Mutual Coupling Reduction in Patch Antenna Array Based on EBG Structure for MIMO Applications

Isolation enhancement of rectangular dielectric resonator antennas using wideband double slit complementary split ring resonators

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