Mutual Coupling Reduction through Defected Ground Structure in Circularly Polarized, Dielectric Resonator-Based MIMO Antennas for Sub-6 GHz 5G Applications

Ali, Anwar; Tong, Jijun; Iqbal, Javed; Illahi, Usman; Rauf, Abdul; Rehman, Saeed Ur; Ali, Haider; Qadir, Mansoor; Khan, Muhammad Amir; Ghoniem, Rania M.

doi:10.3390/mi13071082

Cited by 23 publications

(8 citation statements)

References 29 publications

(36 reference statements)

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“…The antenna offered good MIMO diversity performance with a diversity gain of 10 dB, 80% radiation efficiency, and an ECC of 0.001. A circularly polarized rectangular DRA (Dielectric Resonator Antenna) for MIMO in FR-I NR range 3.57–4.48 GHz with axial ratio bandwidth of 28.33% was achieved [ 79 ]. The antenna featured a conformal metal strip to achieve circular polarization and an S-shaped structure on the ground plane to improve isolation between the radiators.…”

Section: Mimo Antenna Design Approaches For Fr-1 and Fr-2 Bandsmentioning

confidence: 99%

Advances in MIMO Antenna Design for 5G: A Comprehensive Review

Raj

Mishra

Kumar

et al. 2023

Sensors

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Multiple-input multiple-output (MIMO) technology has emerged as a highly promising solution for wireless communication, offering an opportunity to overcome the limitations of traffic capacity in high-speed broadband wireless network access. By utilizing multiple antennas at both the transmitting and receiving ends, the MIMO system enhances the efficiency and performance of wireless communication systems. This manuscript specifies a comprehensive review of MIMO antenna design approaches for fifth generation (5G) and beyond. With an introductory glimpse of cellular generation and the frequency spectrum for 5G, profound key enabling technologies for 5G mobile communication are presented. A detailed analysis of MIMO performance parameters in terms of envelope correlation coefficient (ECC), total active reflection coefficient (TARC), mean effective gain (MEG), and isolation is presented along with the advantages of MIMO technology over conventional SISO systems. MIMO is characterized and the performance is compared based on wideband/ultra-wideband, multiband/reconfigurable, circular polarized wideband/circular polarized ultra-wideband/circular polarized multiband, and reconfigurable categories. The design approaches of MIMO antennas for various 5G bands are discussed. It is subsequently enriched with the detailed studies of wideband (WB)/ultra-wideband (UWB), multiband, and circular polarized MIMO antennas with different design techniques. A good MIMO antenna system should be well decoupled among different ports to enhance its performance, and hence isolation among different ports is a crucial factor in designing high-performance MIMO antennas. A summary of design approaches with improved isolation is presented. The manuscript summarizes the various MIMO antenna design aspects for NR FR-1 (new radio frequency range) and NR FR-2, which will benefit researchers in the field of 5G and forthcoming cellular generations.

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Section: Mimo Antenna Design Approaches For Fr-1 and Fr-2 Bandsmentioning

confidence: 99%

Advances in MIMO Antenna Design for 5G: A Comprehensive Review

Raj

Mishra

Kumar

et al. 2023

Sensors

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“…With the use of DG, it is also possible to test how well a MIMO antenna performs. Though a DG of 10 dB is ideal, values of 6 dB or above are still desirable [27]. The following approximate expression is used to calculate the diversity gain [28]:…”

Section: Performance Of the Proposed Mimo Antennamentioning

confidence: 99%

A Compact Two-Element Linearly and Orthogonal Circularly Polarized MIMO Antenna System for 5G Cellular and WLAN/Wi-Fi 6E Application

Neamah,

Sabbagh,

Al-Rizzo

2023

IEEE Access

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This paper presents the design, analysis, and experimental validation of a compact 21 MIMO antenna operating in two bands. Band 1 is Linearly Polarized (LP) with spatial diversity operating in the sub-6 GHz band for the Fifth Generation (5G). Band 2 is Circularly Polarized (CP) for polarization and pattern diversity with an axial ratio below 3 dB for WLAN, Wi-Fi 6E, and C-band applications. The proposed single antenna consists of a Squared Shape Modified Monopole with partially Defected Ground (SMMDG) fed by Co-Planar Waveguide CPW. The partial ground has a defect on its upper left side and an I-shaped strip on the right side. The two MIMO radiators are arranged in oppositely flipped shapes. The decoupling and common partial ground structure consists of an opposite, Double T-Shaped Strip (DTSS) with a common strip head that performs as a band-stop filter. The overall dimensions of the MIMO antenna are 31.5451.6 mm 3 . The simulated impedance bandwidth of the first band with LP lies between 3.1 and 4.7 GHz, for which S 11 and S 22 < -10 dB, while the measured values are between 3.45 GHz and 4.8 GHz. The simulated impedance bandwidth for the second band for S 11 and S 22 < -10 dB lies between 5.24 and 7.9 GHz, while the measured one lies between 5.65 GHz and 9 GHz. The simulated 3-dB Axial Ratio Bandwidth (ARBW) within Band 2 is (5.6-8.5) GHz, while the measured 3-dB ARBW is (5.95-8.1) GHz. The minimum simulated isolation between the two ports is 17 dB in Band 1 and 26 dB in Band 2, while the minimum measured isolation is 21 dB in Band 1 and 26 dB in Band 2. Wi-Fi 6E (n96) (5.925-7.125) GHz is covered with right-hand circular polarization (RHCP) in the positive Z direction and left-hand circular polarization (LHCP) in the negative Z direction, covering Band 2 with an axial ratio less than 3 dB. Other crucial MIMO metrics are also calculated, such as the Envelope Correlation Coefficient (ECC), Mean Effective Gain (MEG), and Diversity Gain (DG). The antenna provides excellent MIMO diversity performance, which makes it an excellent candidate for many portable wireless applications.

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“…In [53], an A-shaped conformal metal strip achieved circular polarization while an S-shaped slot reduced mutual coupling in a sub-6 GHz rectangular MIMO DRA. The design operated at a resonant frequency of 3.72 GHz with an impedance bandwidth of 3.57-4.48 GHz.…”

Section: Circularly Polarized Designsmentioning

confidence: 99%

MIMO Dielectric Resonator Antennas for 5G Applications: A Review

et al. 2023

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This article presents a thorough literature review of published designs of multiple-input multiple-output (MIMO) dielectric resonator antennas (DRAs) specifically designed for 5G applications. The performance of these designs is discussed in detail, considering various parameters such as gain, isolation, size, bandwidth, profile, and radiation characteristics. The primary objective of this work is to appreciate the significant progress made in this vital area of research. This article also aims to identify any existing gaps in the literature and provide potential directions for future work.

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Mutual Coupling Reduction through Defected Ground Structure in Circularly Polarized, Dielectric Resonator-Based MIMO Antennas for Sub-6 GHz 5G Applications

Cited by 23 publications

References 29 publications

Advances in MIMO Antenna Design for 5G: A Comprehensive Review

Advances in MIMO Antenna Design for 5G: A Comprehensive Review

A Compact Two-Element Linearly and Orthogonal Circularly Polarized MIMO Antenna System for 5G Cellular and WLAN/Wi-Fi 6E Application

MIMO Dielectric Resonator Antennas for 5G Applications: A Review

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