Isolated Ground-Radiation Antenna With Inherent Decoupling Effect and its Applications in 5G MIMO Antenna Array

Piao, Haiyan; Jin, Yunnan; Qu, Longyue

doi:10.1109/access.2020.3013140

Cited by 15 publications

(17 citation statements)

References 62 publications

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“…In recent years, numerous studies have been conducted on MIMO antennas used in the 5G NR operation band [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Amid these studies, various antenna design techniques, such as inverted-F, planar inverted-F antenna (PIFA), monopole, and loop, have been proposed.…”

Section: Introductionmentioning

confidence: 99%

A Six-Port Slot Antenna System With Wideband and High-Isolation for 5g Nr Bands

Mu¹,

Wang²,

Yang³

et al. 2022

PIER M

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In this article, a slot-antenna array with wideband and high-isolation for multiple-input multiple-output (MIMO) systems is presented that can be used in fifth-generation new radio (5G NR) communication. The MIMO antenna system is realized by loading six identical antennas (Ant 1-Ant 6) into an FR4 substrate to form a six-port array for a 6 × 6 MIMO system. Each antenna element is a slot antenna type that is composed of a T-shaped open slot and an L-shaped 50 Ω microstrip line. Each T-shaped slot is formed by inserting an I-shaped open branch in the center of the ground plane's U-shaped slot. The L-shaped microstrip line is placed on the upper surface of FR4 to enable coupling feeding in the 3.3 to 5.10 GHz frequency range to cover the 5G NR bands N77/N78/N79. The isolation is increased to more than 18.1 dB by etching the T-shaped slot between the radiation elements on the metal plate. The proposed antenna system was fabricated and tested. The experimental results indicate that the MIMO system can cover the frequency range of 3.20-5.15 GHz with a return loss of 6 dB and provides isolation greater than 16.2 dB. Additionally, a total efficiency greater than 50% and envelope correlation coefficient of less than 0.02 are obtained. The performance under hand-on scenarios is also good. Simulated and measured results indicate that the stated results are consistent. The test results indicate that the antenna satisfies the 5G communication requirements.

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Section: Introductionmentioning

confidence: 99%

A Six-Port Slot Antenna System With Wideband and High-Isolation for 5g Nr Bands

Mu¹,

Wang²,

Yang³

et al. 2022

PIER M

View full text Add to dashboard Cite

show abstract

“…In the literature, various solutions have been presented, offering important features such as large scale and integration. [4][5][6][7][8][9][10][11][12] Although large-scale antenna elements can be possibly allocated to the volume-constraint terminals, the required antenna distance is still large, and the integration level is not high enough. More importantly, most of the aforementioned techniques are only in narrow-band or single-band operation.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, large‐scale MIMO antennas with high isolation and low correlation have always been challenging issues, especially in crowded terminal devices where compactness must be addressed. In the literature, various solutions have been presented, offering important features such as large scale and integration 4–12 . Although large‐scale antenna elements can be possibly allocated to the volume‐constraint terminals, the required antenna distance is still large, and the integration level is not high enough.…”

Section: Introductionmentioning

confidence: 99%

Integrated dual‐band multiple‐input multiple‐output antenna module using higher mode control for 5G applications

Piao²

2022

Int J RF Mic Comp-Aid Eng

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This study presents a self-decoupled and highly integrated multiple-input multiple-output (MIMO) antenna pair for the 3.5 GHz (3.4-3.6 GHz) and 5 GHz (4.8-5 GHz) frequency bands, where a loop-type antenna and a dipoletype antenna are assembled into the front and backside of a compact modular board. A tuning inductor and a tuning capacitor are employed in the loop-type antenna and the dipole-type antenna, respectively, for higher mode resonance control, such that the dominant mode and higher mode of each antenna element are excited to achieve dual-band operation. Herein, the dominant modes of the loop-type antenna and the dipole-type antenna are orthogonal to each other, contributing to the self-decoupling effect in the lower band. Otherwise, the modal orthogonality of the higher modes of the two antennas is responsible for the high-isolated performance of the higher band. In this way, the proposed dual-band MIMO antenna module obtains a high spatial utilization ratio, even though they are disposed of in the same volume. The MIMO antenna module can produce impedance bandwidths above 200 MHz at both frequency bands, and the isolation within the lower and higher bands is above 16.5 and 13.5 dB, respectively. Additionally, an 8 Â 8 MIMO antenna array is further constructed and measured. In measurement, the total efficiencies are higher than 60%, and the envelope correlation coefficient values are all below 0.1. Therefore, it is demonstrated that the proposed technique can be promisingly applied in large-scale MIMO antenna systems for current and future terminal devices, having advantages in multiband operation, high integration, and inherent isolation.

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“…In recent years, many MIMO antenna systems have been reported for mobile communications with acceptable isolation and envelope correlation coefficient (ECC) 6–26 . There are numerous mature decoupling methods available, including the use neutralization line (NL) method, 6–8 defected ground structure (DGS) method, 9–11 polarization diversity technique, 12–19 self‐decoupling, 20,22 using decoupling network, 24,25 and characteristic mode analysis 26 .…”

Section: Introductionmentioning

confidence: 99%

A compact, high isolation building block for 8 × 8 multi‐input multi‐output antenna array suitable for 5G smartphone applications

Gupta

Bage

Ranjan

2022

Int J RF Mic Comp-Aid Eng

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In this article, compact inverted F-antennas (IFAs) operating in the 3.5 GHz band is proposed for future 5G smartphone applications. The conventional IFA is modified to make the structure compact and efficient. The additional IFAs are aligned in face-to-face configuration to reduce the coupling between them up to some extent. Furthermore, a novel decoupling element is incorporated between antenna pairs to effectively enhance the isolation. As a result, the proposed building block exhibits isolation higher than 28.2 dB between two adjacent ports. Based on highly isolated building blocks, a 4 Â 4 and 8 Â 8 multi-input multi-output (MIMO) antenna array is designed and investigated which is operated in 3.5 GHz (LTE band 42). The proposed 8 Â 8 MIMO antenna array has four compact building blocks and reserves sufficient space for integrating other antennas such as 2G/3G/4G antennas. To validate the simulated results, a prototype of the proposed antenna is fabricated and tested.Over the entire operating frequency, the fabricated 8 Â 8 MIMO antenna array obtain high isolation of more than 27.3 dB, and high antenna efficiency (>61%). Also, its corresponding measured envelope correlation coefficients are lower than 0.04 and channel capacity was about 39.1-40.6 bps/Hz. The measured results show that the proposed MIMO antenna array is a good candidate for future fifth-generation smartphone applications.

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Isolated Ground-Radiation Antenna With Inherent Decoupling Effect and its Applications in 5G MIMO Antenna Array

Cited by 15 publications

References 62 publications

A Six-Port Slot Antenna System With Wideband and High-Isolation for 5g Nr Bands

A Six-Port Slot Antenna System With Wideband and High-Isolation for 5g Nr Bands

Integrated dual‐band multiple‐input multiple‐output antenna module using higher mode control for 5G applications

A compact, high isolation building block for 8 × 8 multi‐input multi‐output antenna array suitable for 5G smartphone applications

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