scholarly journals Compact MIMO Slots Antenna Design with Different Bands and High Isolation for 5G Smartphone Applications

2020 ◽  
Vol 16 (4(Suppl.)) ◽  
pp. 1093
Author(s):  
Ayman mohammed Ibrahim
Keyword(s):  
Correlation Coefficient ◽  
Return Loss ◽  
Antenna Design ◽  
Smartphone Applications ◽  
Mimo Antenna ◽  
Mimo Antennas ◽  
Chinese Markets ◽  
High Degree ◽  
Degree Of Isolation ◽  
Envelope Correlation

 In this paper, two elements of the multi-input multi-output (MIMO) antenna had been used to study the five (3.1-3.55GHz and 3.7-4.2GHz), (3.4-4.7 GHz), (3.4-3.8GHz) and (3.6-4.2GHz) 5G bands of smartphone applications that is to be introduced to the respective US, Korea, (Europe and China) and Japan markets. With a proposed dimension of 26 × 46 × 0.8 mm3, the medium-structured and small-sized MIMO antenna was not only found to have demonstrated a high degree of isolation and efficiency, it had also exhibited a lower level of envelope correlation coefficient and return loss, which are well-suited for the 5G bands application. From the fabrication of an inexpensive FR4 substrate with a 0.8 mm thickness level, a loss tangent of 0.035 and a dielectric constant of 4.3, the proposed MIMO antennas that had been simulated under the five different band coverage were discovered to have demonstrated a respective isolation level of about 14dB, 12dB, 21.5dB, 19dB and 20dB under a -10dB impendence bandwidth. In the measurement and fabrication outcomes that were derived from the use of the prototype MIMO in the (3.4-3.8) band of the Europe and Chinese markets, the proposed MIMO was thus found to have produced a better performance in terms of efficiency, isolation, and envelope correlation coefficient (ECC).

scholarly journals A Compact MIMO Antenna with Inverted C-Shaped Ground Branches for Mobile Terminals

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Zixian Yang ◽  
Hongchun Yang ◽  
Haijuan Cui
Keyword(s):  
Correlation Coefficient ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Planar Antenna ◽  
Mobile Terminals ◽  
Mimo Antenna ◽  
High Isolation ◽  
Operating Band ◽  
Measured Radiation ◽  
Envelope Correlation

A compact printed MIMO antenna for mobile terminals is presented. With two planar antenna elements, the −6 dB impedance bandwidth of 2.32 GHz (1.48–3.8 GHz) is obtained, which covers GSM 1800/1900, UMTS, WLAN, Wimax, S-band, and most of LTE bands. Each antenna element with a small occupation of 15 × 20 mm2consists of a driven strip and a shorted strip. Two inverted C-shaped ground branches are introduced between two elements to improve the isolation. The simulated results are studied and the measured results show that high isolation of more than 18 dB at the entire operating band is achieved. Meanwhile, the impedance performance is also improved by adding the branches. Furthermore, the measured radiation performances and envelope correlation coefficient also demonstrate that the proposed antenna could be a good candidate for mobile terminals.

scholarly journals Design of a MIMO Antenna with Improved Isolation Using MNG Metamaterial

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Youngki Lee ◽  
Deukhyeon Ga ◽  
Jaehoon Choi
Keyword(s):  
Correlation Coefficient ◽  
Return Loss ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Impedance Bandwidth ◽  
Negative Permeability ◽  
Split Ring ◽  
Mimo Antenna ◽  
Term Evolution

A multi-input multi-output (MIMO) antenna with improved isolation using an interdigital split ring resonator (SRR) is proposed. The necessary impedance bandwidth is obtained by utilizing the coupling between the meander strip and an invertedLstrip. Using interdigital SRR, a negative permeability was generated, while achieving improved isolation between the two radiating elements. The fabricated antenna satisfies the 10 dB return loss in the long-term evolution (LTE) band 40 from 2.3 GHz to 2.4 GHz. The measured peak gains of the two elements were 2.0 dBi and 1.3 dBi. The measured envelope correlation coefficient was less than 0.16 over the frequency band of interest.

scholarly journals DESIGN OF 28 GHZ MICROSTRIP MIMO ANTENNAS FOR FUTURE 5G APPLICATIONS

SINERGI ◽  
2018 ◽  
Vol 22 (3) ◽  
pp. 149 ◽  
Author(s):  
Yusnita Rahayu ◽  
Luthfi Afif ◽  
Muhammad Rizki Radhelan ◽  
I. Yasri ◽  
Feri Candra
Keyword(s):  
Microstrip Line ◽  
Return Loss ◽  
High Gain ◽  
Directional Pattern ◽  
Federal Communications Commission ◽  
System Capacity ◽  
Mimo Antenna ◽  
Mimo Antennas ◽  
Pattern Comparison ◽  
The U.S

The 5G system requires more significant system capacity, more full bandwidth, and higher frequency. One type of antenna that can be used to increase the channel capacity is microstrip MIMO antenna. The Federal Communications Commission of the U.S. has recently designated the frequency band from 27.5 to 28.35 GHz for 5G applications. In this paper, the design of 28 GHz microstrip MIMO antenna for future 5G applications was proposed. The antenna was designed by using RT Duroid 5880 substrate with a dielectric constant of 2.2 and the loss tangent of 0.0009. The antenna operated from 27.10 GHz to 28.88 GHz with 1.78 GHz (6.35%) of bandwidth. The antenna consisted of four elements feeding by a microstrip line. Based on the simulated results, the high gain of 14.8 dBi is obtained with a linear directional pattern. Comparison performance regarding gain, return loss, VSWR and bandwidth are also presented for single, two and four elements.  It is shown that the increasing number of elements of antenna increased the gain and the return loss. The antenna meets the 5G requirements.

Isolation enhancement of metamaterial structure MIMO antenna for WiMAX/WLAN/ITU band applications

2022 ◽  
pp. 1-11
Author(s):  
Pasumarthi Suneetha ◽  
Kethavathu Srinivasa Naik ◽  
Pachiyannan Muthusamy
Keyword(s):  
Correlation Coefficient ◽  
Mutual Coupling ◽  
Unit Cell ◽  
Antenna Design ◽  
Network Analyzer ◽  
Metamaterial Structure ◽  
Ground Structure ◽  
Mimo Antenna ◽  
Better Than ◽  
Directive Gain

Abstract The μ-negative metamaterial (MNG) two-element MIMO antenna design was proposed in this article for WiMAX (2.5–2.8 GHz), WLAN (3.2–5.9 GHz), and ITU band (8.15−8.25 GHz) applications. The first design of the MIMO antenna operates at 2.7 and 4.9 GHz frequencies. In order to reduce the mutual coupling, a defective ground structure is used. For further isolation improvement, an MNG unit cell is placed in between the two radiating elements at a distance of 10 mm. The designed antenna elements have better than −23 dB coupling isolation between the two radiating elements. Moreover, with MNG an additional frequency of 8.2 GHz is obtained, which is useful for ITU band applications. The proposed antenna bandwidth is expanded by 19% in the lower operational band, 20% in the second operational band, and 32% in the higher frequency band with the MNG unit cell. From the analysis, the proposed antenna is suitable for WiMAX/WLAN/ITU band applications because of its low enveloped correlation coefficient, and highest directive gain and low mutual coupling between the radiating components. The proposed antenna was simulated, fabricated, and measured with the help of the Schwarz ZVL vector network analyzer and anechoic chamber. Both measured and simulated results are highly accurate and highly recommended for WiMAX/WLAN/ITU bands.

Side-Frame Dual-Band MIMO Antennas for 5G Smartphone Applications

2021 ◽  
Vol 35 (11) ◽  
pp. 1314-1315
Author(s):  
Guobo Wei ◽  
Quanyuan Feng
Keyword(s):  
Impedance Matching ◽  
Antenna System ◽  
Circuit Board ◽  
Dual Band ◽  
Smartphone Applications ◽  
Mimo Antenna ◽  
Mimo Antennas ◽  
Fifth Generation ◽  
Full Screen ◽  
5 Ghz

A side-frame dual-band multi-input multi-output (MIMO) antenna system for fifth-generation (5G) mobile communication in smartphone applications is presented, operating in 3.5 GHz band (3400-3600 MHz) and 5 GHz band (4800-5000 MHz). The proposed four-element antenna array is placed at four corners of the circuit board and printed on the side edge frame. The height of the structure is only 4.1 mm, which is compatible for ultra-thin full screen smartphones. According to the verification of HFSS and CST, ideal impedance matching bandwidths (superior to 10dB) and excellent isolations (superior to 18 dB) are obtained over the 3.5 GHz band and 5 GHz band, with peak gain of 6.18 dB and 4.9 dB, respectively.

scholarly journals Design of a Compact MIMO Antenna Using Coupled Feed for LTE Mobile Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Xing Zhao ◽  
Youngki Lee ◽  
Jaehoon Choi
Keyword(s):  
Correlation Coefficient ◽  
Mobile Applications ◽  
Return Loss ◽  
Impedance Matching ◽  
Antenna Element ◽  
Mimo Antenna ◽  
First Order ◽  
Term Evolution ◽  
Radiating Element

A compact multi-input multi-output (MIMO) antenna with a coupled feed structure for 4th generation (4G) handsets is proposed for operation in long-term evolution (LTE) band 13 (0.746 GHz–0.787 GHz). The MIMO antenna consists of two symmetrically distributed identical antenna elements. The size of each element is limited to 20 mm × 10 mm × 5 mm (λ0=392 mm at 0.765 GHz), and the separation between different elements is minimized to 15 mm. Each antenna element contains a Z-shaped coupled feed strip and a simple folded monopole-type radiating element. The simple folded radiating element supports two monopole modes (first order) excited at adjacent frequencies to achieve broadband performance. The coupled feed strip effectively modifies impedance matching and maintains good isolation. The proposed antenna has a 6 dB return loss bandwidth of 55 MHz (0.735 GHz–0.79 GHz) and isolation above 12 dB without the use of an additional isolation enhancement element. Moreover, the envelope correlation coefficient (ECC) is maintained below 0.5 over the designed frequency band.

scholarly journals Active Patch Antenna for Wi-Fi 5, 6 and Wi-Fi 6E Applications

2021 ◽  
Vol 2096 (1) ◽  
pp. 012010
Author(s):  
E A Ischenko ◽  
Yu G Pasternak ◽  
V A Pendyurin ◽  
S M Fedorov
Keyword(s):  
Antenna Array ◽  
Correlation Coefficient ◽  
Patch Antenna ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Mimo Antenna ◽  
S Parameters ◽  
Envelope Correlation

Abstract The article discusses a planar patch antenna with a metamaterial integrated into the structure, which allows the antenna to function in the upper Wi-Fi 5, 6 frequency range and the Wi-Fi 6E range. For the study, we built graphs of S-parameters, radiation patterns; on the basis of the resulting structure, we formed a MIMO antenna array for which we determined the main characteristics - the envelope correlation coefficient and the multiplexing efficiency

INTERCONNECTION OF VIVALDI ANTENNAS IN THE MIMO ANTENNA ARRAY

2021 ◽  
pp. 108-111
Author(s):  
С.М. Фёдоров ◽  
Е.А. Ищенко ◽  
И.А. Зеленин ◽  
Е.В. Папина ◽  
Е.Д. Меньшикова ◽  
...  
Keyword(s):  
Antenna Array ◽  
Correlation Coefficient ◽  
Communication Systems ◽  
Information Transfer ◽  
Diversity Gain ◽  
Stable Operation ◽  
Mimo Antenna ◽  
Information Transfer Rate ◽  
Vivaldi Antennas ◽  
Envelope Correlation

Рассматривается MIMO антенная решетка, сформированная из двух антенн Вивальди, которые должны обеспечить работу в частотном диапазоне, выделенном для сетей пятого поколения - 24,25-24,65 ГГц. Для определения основных параметров антенны применялось моделирование, на основе которого были установлены основные характеристики MIMO антенной решетки: коэффициент корреляции огибающей, коэффициент усиления при разнесенном режиме, эффективность сложения. По результатам было определено, что при расстоянии между антеннами в 6,13 мм достигаются максимально возможные характеристики MIMO антенной решетки, а для стабильного функционирования достаточным является расстояние в 2,45 мм. В статье приводятся размеры исследуемой антенны, графики обратных потерь (S - параметров), диаграммы направленности, коэффициентов корреляции огибающих, коэффициента усиления при разнесенном режиме, эффективности сложения при различных расстояниях между антенными элементами. Обеспечение стабильности работы MIMO антенной решетки является важной задачей, так как все современные системы связи используют эту технологию для реализации многоканальной передачи, а следовательно, для повышения скорости передачи информации. Для определения геометрических характеристик и выполнения моделирования применялось специализированное программное обеспечение The article discusses a MIMO antenna array formed of two Vivaldi antennas, which should provide operation in the frequency range allocated for fifth generation networks - 24.25-24.65 GHz. To determine the main parameters of the antenna, we applied modeling, on the basis of which we determined the main characteristics of the MIMO antenna array: the envelope correlation coefficient, the diversity gain, the multiplexing efficiency. According to the results, we determined that with a distance between antennas of 6.13 mm, the maximum possible characteristics of a MIMO antenna array are achieved, and a distance of 2.45 mm is sufficient for stable operation. The article gives the dimensions of the antenna under study, graphs of return loss (S11 - parameters), radiation patterns, envelope correlation coefficient, diversity gain, multiplexing efficiency at different distances between the antenna elements. Ensuring the stability of the MIMO antenna array is an important task since all modern communication systems use this technology to implement multichannel transmission, and, consequently, to increase the information transfer rate. We used specialized software to determine geometric characteristics and perform modeling

High Isolation 8⨯8 MIMO Antenna Design for 5G Sub-6 GHz Smartphone Applications

2020 ◽  
Author(s):  
Matthew Bridges ◽  
Mohsen Khalily ◽  
Mohammad Abedian ◽  
Demos Serghiou ◽  
Pei Xiao ◽  
...  
Keyword(s):  
Antenna Design ◽  
Smartphone Applications ◽  
Mimo Antenna ◽  
High Isolation
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