Wyniki wyszukiwania - Biblioteka Nauki

1

A Review of Isolation Techniques for 5G MIMO Antennas

100%

Kaur P. , Malhotra S. , Sharma M.

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tom nr 3

43--50

EN

This paper offers an analysis of mutual coupling reduction techniques used in MIMO antennas designed for sub-6 GHz, 28 GHz, and 28/38 GHz dual frequency bands which are allocated to 5G technology. The said techniques take into account size, gain, isolation, and all diversity-related parameters, such as envelope correlation coefficient (ECC), directive gain (DG), and channel capacity loss (CCL). A review of current technologies is presented in the paper too. The isolation techniques are studied in detail and comparisons between the various works are drawn. Finally, the best isolation technique suitable for specific bands, applications and different port numbers is determined.

2

Analyzing Performance of THz Band Graphene-Based MIMO Antenna for 6G Applications

75%

Asaad N. S. , Saleh A. M. , Alzubaidy M. A.

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tom nr 3

23--29

EN

In this paper, a compact 2×2 hexagon ring-shaped MIMO antenna operating at the terahertz band is proposed for future 6G wireless communication applications. The antenna is designed using graphene, due to its unique high-speed transmission capabilities. DGS and NL decoupling approaches are applied to enhance isolation between the two radiating elements. A parametric study is performed to investigate the significance of using these methods. Performance in terms of different metrics is studied using the CST Microwave Studio simulator. The final outcomes show that the proposed MIMO antenna achieves 23 dB of isolation, 0.004859 of ECC, 0.004 bits/sec/Hz of CCL, and efficiency of 98%.

3

Compact MIMO antenna design based on fractal geometry and DSG

63%

Cao T. N. , Krzysztofik W. J.

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tom nr 6

299-302, CD

EN

The paper presents a 2-port MIMO antenna, which is designed to operate in the 5.745 GHz band for WLAN systems. The antenna is designed based on a combination of fractal geometry and metamaterial structure to reduce its size and enhance its bandwidth. The microwave laminate FR4-epoxy with permittivity = 4.4, thickness h = 1.6mm and dielectric tangent loss 0.02 is used as an antenna substrate. The result of the design is a compact size MIMO antenna with an overall size of 30.4x13.4mm. MIMO antennas achieve high performance through the evaluation of criteria as Envelope of Correlation Coefficient, ECC, Total Active Reflection Coefficient, TARC, and Channel Capacity Loss, CCL. All of them satisfied well the WLAN-MIMO system requirements.

4

Sierpinski MIMO antenna for 5G applications

63%

Mousa A. H. , Bin Othman M. A. , Abidin M. Z. , Ibrahim A. M.

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tom R. 97, nr 7

126--131

EN

A Sierpinski MIMO antenna was designed in the band of 3.4 – 3.8 GHz for 5G communications is demonstrated in this paper. The proposed antenna is printed on a FR_4 substrate material and dimension of the antenna was 20 × 25 × 0.8 mm3 . This paper presents the development of a compact MIMO antenna using a new structure integrated with the Sierpinski using neutralization line and defected ground structure techniques for mutual coupling reduction and antenna isolation improvement. The simulated results proved that the proposed method gives an excellent isolation performance. A good impedance matching return loss of large than 10 dB, high isolation of large than 22 dB at the operating frequency, and low ECC that was 0.026 was simulated across the coveted operating bandwidth.

PL

W artykule przedstawiono antenę Sierpińskiego MIMO, która została zaprojektowana w paśmie 3,4 - 3,8 GHz dla komunikacji 5G. Proponowana antena jest drukowana na podłożu FR_4, a wymiary anteny to 20 × 25 × 0,8 mm3. W artykule przedstawiono opracowanie kompaktowej anteny MIMO wykorzystującej nową konstrukcję zintegrowaną z anteną Sierpińskiego z wykorzystaniem linii neutralizacji oraz technik uszkodzonej struktury gruntu w celu redukcji wzajemnych sprzężeń i poprawy izolacji anteny. Symulowane wyniki dowiodły, że proponowana metoda zapewnia doskonałą izolację. W pożądanym paśmie roboczym zasymulowano dobre dopasowanie impedancji tłumienia odbicia większe niż 10 dB, wysoką izolację większą niż 22 dB przy częstotliwości roboczej i niskie ECC, które wynosiło 0,02.

5

Compact V-shaped MIMO antenna for LTE and 5G applications

63%

Ibrahim A. M.

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tom R. 96, nr 11

84--89

EN

A compact sierpinski MIMO antenna was designed in the bands of 4.4 - 4.9 GHz and 5.15 - 5.925 GHz.The proposed dimension of the antenna were 21 × 24 × 0.8 mm, and was fabricated with inexpensive FR4 substrate with a thickness of 0.8 mm, a dielectric constant of 4.3, and 0.035-mm thick copper lining. The fabrication and measurement outcomes derived from the MIMO prototypes revealed that the proposed MIMO antennas are better in terms of size, isolation and the ECC. These attributes are suitable for LTE and 5G smartphone applications, which are being introduced into Chinese and Japanese markets.

PL

Przedstawiono projekt anteny MIMO o paśmie 4.4 – 4.9 GHz oraz 5.13 – 5.925 GHz. Wymiary anteny: 21 × 24 × 0.8 mm. Badania wykonanej anteny wykazay jej przydatność do LTE i 5 G zastosowań.