Implementation of four-port MIMO diversity microstrip antenna with suppressed mutual coupling and cross-polarized radiations

Sharma, Sandeep; Mainuddin,; Kanaujia, Binod Kumar; Khandelwal, Mukesh Kumar

doi:10.1007/s00542-019-04574-1

Cited by 15 publications

(10 citation statements)

References 19 publications

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“…By using parasitic elements isolation is improve by 20 dB. In 32 , four elements MIMO antenna is proposed operating from 23 to 28 GHz, isolation is improve by using defective ground plane.…”

Section: Resultsmentioning

confidence: 99%

“…of ports Center frequency (GHz) Fractional bandwidth (%) Min. isolation (dB) Edge to edge (λo) Gain (dBi) 27 4.8 × 2.1 cDRA 2 30 6.1 25 λo/3.6 6.9, 8.6 28 NA Horn-shaped Via 4 36 11 21 λo/1.27 10.8 29 3.9 × 7.9 Metasurface 2 28 17.8 37.1 NA 16.13 30 4.47 × 0.89 corner trimming 4 28 17 21 λo/6 10 31 0.41 × 0.44 Adding Decoupling structure 4 3.1 136 20 NA 4 32 1.85 × 5.6 DGS 4 25 22 28 NA 7.1 14 0.704 × 1.05 …”

Section: Resultsmentioning

confidence: 99%

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A compact two elements MIMO antenna for 5G communication

Ahmad

Choi

Ullah³

2022

Sci Rep

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This study presents a simple, miniaturized, and low-profile multiple-input multiple-output (MIMO) antenna operating at 29 GHz with reduced mutual coupling between the antenna elements for futuristic 5G communication. The proposed design employs two radiating elements with slits in the radiators to produce high isolation among the antenna radiators. The MIMO antenna maintains a compact structure of 11.4 × 5.3 mm2, which is the smallest size compared to previous 5G antennas. Roger’s 4350B laminate was employed as a substrate material. At 29 GHz, low mutual coupling of − 36 dB, low envelope correlation coefficient (ECC < 0.001), and high diversity gain (DG > 9.8 dB) are achieved. The proposed design is examined in terms of the S-parameters, diversity gain, radiation pattern, and envelope correlation. Compared to the straight antenna element, an improvement of − 20 dB is observed in the isolation for both the simulated and measured results.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A compact two elements MIMO antenna for 5G communication

Ahmad

Choi

Ullah³

2022

Sci Rep

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“…In [21], eight-port UWB MIMO antenna with a parasitic decoupling structure at antenna rear-sides has been designed to reduce mutual coupling. Sandeep Sharma et al [22], uses DGS in designing the structure of the antenna to give high isolation, low correlation coefficient, and suppressed cross-polarization with high gain.…”

Section: Introductionmentioning

confidence: 99%

Sub-6 GHz Highly Isolated Wideband MIMO Antenna Arrays

et al. 2022

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This study proposes a compact four-port multiple-input multiple-output (MIMO) antenna system to operate within a frequency range of 3.2-5.75 GHz to serve in 5G new radio (NR) sub-6 GHz n77/n78/n79 and 5 GHz WLAN with good impedance matching. To increase the isolation between the MIMO antenna elements with low complexity and cost, the antenna elements are orthogonally oriented to each other with distance spacing of 0.3λ˳ between elements, including electromagnetic bandgap (EBG) structure, defected ground structure (DGS), capacitive elements (CE), and neutralization line (NL). The simulation results show that the measured mutual coupling between the array elements is improved from −20 to −45 dB. The envelope correlation coefficient is enhanced. In addition, the diversity gain, mean effective gain, and total active reflection coefficient are improved simultaneously. The suggested structure has been designed on CST Microwave Studio 2019. The antennas' overall dimensions for all methods are the same as they approach 46 mm × 46 mm × 1.6 mm. The measured gain of the proposed designs ranges from 6 to 9 dBi, and the radiation efficiency approaches 90%. The antennas are fabricated and tested, where better experimental results are noticed compared to the simulation results. Our antennas are designed over FR-4 substrate with a noticeable cost reduction. Each antenna element has a dimension of 15 mm × 23 mm × 1.6 mm. An "EL" slot into the radiating element and two identical stubs coupled to the partial ground are used to improve the impedance matching and radiation characteristics across the bands of interest. The isolation decreases by 22 dB using the EBG method, reaching the value of −65 dB. Meanwhile, the isolation decreases by 19 dB using the DGS method, reaching −60 dB. Due to gaps between adjacent unit cells and the capacitance generated from the dielectric gap between the top metallic patch and ground plane, the EBG method gives the best results. However, in the CE method, capacitances resulting from the four transmission lines in the bottom side of the antennas (parasitic elements) decrease the isolation by 15 dB, reaching −40 dB. NL method makes the isolation to reach the value of −55 dB. Accordingly, the proposed antenna arrays support 5G NR sub-6 GHz n77/n78/n79 and 5 GHz WLAN, where n77 (3.3-4.2 GHz), n78 (3.3-3.80 GHz), and n79 (4.4-5.0 GHz) require a wideband coverage that extends from 3.3 GHz to at least 5.0 GHz.

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“…On both sides of the dielectric material, the antenna elements are arranged in an orthogonal pattern 9 . Parallel slits DGS pattern is utilized which gives a high level of isolation, low correlation coefficient between the ports 10 …”

Section: Introductionmentioning

confidence: 99%

“…9 Parallel slits DGS pattern is utilized which gives a high level of isolation, low correlation coefficient between the ports. 10 Many researchers have been interested in DRA-based MIMO antennas in recent decades because of their higher data rates and ease of fabrication. Due to the absence of a metallic component, the DRA has higher advantages such as a high level of radiation efficiency and gain.…”

Section: Introductionmentioning

confidence: 99%

Two asymmetric cylindrical dielectric resonator loaded dual port multiple‐input multiple‐output antenna for wide band application with circular polarization attributes

Dwivedi

K.N.

Kumar

et al. 2022

Int J Communication

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A novel multiple-input multiple-output double asymmetrical cylindrical dielectric resonator antenna (MIMO-DCDRA) with modified stub line feed is discussed and proposed in this work. Two unequal CDRA are placed diagonally to each other and are electromagnetically coupled with feeding arrangement via two asymmetrical circular apertures. By performing the optimization of the dimensional parameters, a significant impedance bandwidth of 70.84% ranging from 2.87 to 5.76 GHz and axial ratio bandwidth (ARBW) of 34.89% is obtained. Antenna gain is about 5.0 dBi within the operating frequency. The proposed MIMO-DCDRA exhibits a low mutual coupling of (jS 21 j & jS 12 j < À20 dB) with the incorporation of a neutralization line. There are various diversity parameters that are also discussed in terms of mutual coupling, envelop correlation coefficient (ECC < 0.002), diversity gain (DG > 9.995), and channel capacity loss (CCL < 0.3 bits/s/Hz) over the entire impedance bandwidth.

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Implementation of four-port MIMO diversity microstrip antenna with suppressed mutual coupling and cross-polarized radiations

Cited by 15 publications

References 19 publications

A compact two elements MIMO antenna for 5G communication

A compact two elements MIMO antenna for 5G communication

Sub-6 GHz Highly Isolated Wideband MIMO Antenna Arrays

Two asymmetric cylindrical dielectric resonator loaded dual port multiple‐input multiple‐output antenna for wide band application with circular polarization attributes

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