Tri-Port Antenna With Shared Radiator and Self-Decoupling Characteristic for 5G Smartphone Application

Yang, Bixia; Xu, Yunxue; Tong, Jiahao; Zhang, Yuhao; Feng, Yuwen; Hu, Yafei

doi:10.1109/tap.2021.3137378

Cited by 33 publications

(11 citation statements)

References 15 publications

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“…To meet the needs of mobile communications, there is a large body of literature on designing MIMO antennas for 5G smartphone applications [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. These systems have shown advantages in terms of isolation, envelope correlation coefficient (ECC) and antenna efficiency, while different techniques and decoupling structures have been proposed and investigated to improve the isolation, such as orthogonal mode isolation in [ 6 ], parasitic structure and polarization diversity in [ 7 ] and the neutralization line technique in [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…The literature [ 15 ] proposes an integrated MIMO antenna with a coupled-loop structure based on the pattern cancellation method, which achieves self-decoupling. In [ 16 , 17 , 18 , 19 ], high isolation is achieved by loading antenna pairs decoupled by aggregate elements. Moreover, recently, a new dual-antenna MIMO structure based on spatial multiplexing, called an antenna pair [ 20 , 21 , 22 , 23 ], has been investigated.…”

Section: Introductionmentioning

confidence: 99%

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A 12-Port MIMO Antenna System for 5G/WLAN Applications

You,

Wang,

Nie

et al. 2023

Micromachines

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In this paper, a 12-port MIMO antenna system for 5G/WLAN applications is proposed. The proposed antenna system consists of two types of antenna modules: an L-shaped antenna module covering the C-band (3.4–3.6 GHz) for 5G mobile applications and a folded monopole module for the 5G/WLAN mobile application band (4.5–5.9 GHz). Each two antennas form a pair, six pairs in total, forming a 12 × 12 MIMO antenna array, and the elements between the antenna pairs can achieve an isolation of 11 dB or more without additional decoupling structures. Experimental results show that the antenna can cover the 3.3–3.6 GHz and 4.5–5.9 GHz bands with an overall efficiency greater than 75% and an envelope correlation coefficient less than 0.04. Finally, the one-hand holding mode and two-hand holding mode are discussed to demonstrate their stability in practical applications, and the results show that they still exhibit good radiation and MIMO performance when operating in both modes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 12-Port MIMO Antenna System for 5G/WLAN Applications

You,

Wang,

Nie

et al. 2023

Micromachines

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“…The multiantenna system, called multiple-input-multiple-output (MIMO) technology, is the core technology of the 5G networks because of its potential applications in industry 4.0 and beyond, including smart health, smart city, smart transportation, smart home, wearable devices, and more [ 4 , 5 ]. The MIMO system can effectively improve the data rate, signal quality, and channel capacity with limited bandwidth and power requirements compared to the single antenna system [ 6 , 7 ]. Additionally, it can also mitigate the fading effects and achieve diversity characteristics [ 2 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

A Compact Mu-Near-Zero Metamaterial Integrated Wideband High-Gain MIMO Antenna for 5G New Radio Applications

et al. 2023

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This article demonstrates a compact wideband four-port multiple-input-multiple-output (MIMO) antenna system integrated with a wideband metamaterial (MM) to reach high gain for sub-6 GHz new radio (NR) 5G communication. The four antennas of the proposed MIMO system are orthogonally positioned to the adjacent antennas with a short interelement edge-to-edge distance (0.19λmin at 3.25 GHz), confirming compact size and wideband characteristics 55.2% (3.25–5.6 GHz). Each MIMO system component consists of a fractal slotted unique patch with a transmission feed line and a metal post-encased defected ground structure (DGS). The designed MIMO system is realized on a low-cost FR-4 printed material with a miniature size of 0.65λmin × 0.65λmin × 0.02λmin. A 6 × 6 array of double U-shaped resonator-based unique mu-near-zero (MNZ) wideband metamaterial reflector (MMR) is employed below the MIMO antenna with a 0.14λmin air gap, improving the gain by 2.8 dBi and manipulating the MIMO beam direction by 60°. The designed petite MIMO system with a MM reflector proposes a high peak gain of 7.1 dBi in comparison to recent relevant antennas with high isolation of 35 dB in the n77/n78/n79 bands. In addition, the proposed wideband MMR improves the MIMO diversity and radiation characteristics with an average total efficiency of 68% over the desired bands. The stated MIMO antenna system has an outstanding envelope correlation coefficient (ECC) of <0.045, a greater diversity gain (DG) of near 10 dB (>9.96 dB), a low channel capacity loss (CCL) of <0.35 b/s/Hz and excellent multiplexing efficiency (ME) of higher than −1.4 dB. The proposed MIMO concept is confirmed by fabricating and testing the developed MIMO structure. In contrast to the recent relevant works, the proposed antenna is compact in size, while maintaining high gain and wideband characteristics, with strong MIMO performance. Thus, the proposed concept could be a potential approach to the 5G MIMO antenna system.

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“…To address these challenges, researchers have proposed various decoupling methods to improve the isolation between antenna elements [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Tese methods include defect grounding structures [7][8][9][10], decoupling networks [11][12][13][14][15][16][17], and orthogonal polarization [18,19]. Te simplest and most direct method is to change the distance between the antennas to reduce the mutual infuence between them.…”

Section: Introductionmentioning

confidence: 99%

Design of an Enhanced Isolation 8-Unit MIMO Antenna for Smartphones Operating in 5G nR and LTE 42 Bands

Miao

Wang

2023

International Journal of Antennas and Propagation

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A miniaturized enhanced isolation 8-unit MIMO antenna for smartphones is proposed in this paper. The units are planar inverted-F antennas with the same structure, and we use the slotting method and shorted probe to miniaturize them. The size of every unit is 14 × 6 mm2 (0.149 × 0.064λ2). We insert an L-shaped decoupling element into the middle of adjacent radiating elements and connect the decoupling element to the GND. Note that the decoupling elements are on the outer side of the substrate, and the radiating elements are on the inner side of the substrate. Finally, a prototype is fabricated and measured. The measured results show that the bandwidth of the MIMO antenna is from 3.0 GHz to 5.3 GHz (55.4%), which fully supports the n77, n78, and n79 in the 5G nR frequency band and the 4G LTE 42 frequency band (S11 less than −6 dB). The measured isolation of the MIMO antenna is greater than 25 dB by using the decoupling method in this paper. The envelope correlation coefficient of the proposed MIMO antenna is less than 0.08, its radiation efficiency is greater than 50%, and its gain is between 4.2 and 5.3 dBi in the whole operating frequency band.

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Tri-Port Antenna With Shared Radiator and Self-Decoupling Characteristic for 5G Smartphone Application

Cited by 33 publications

References 15 publications

A 12-Port MIMO Antenna System for 5G/WLAN Applications

A 12-Port MIMO Antenna System for 5G/WLAN Applications

A Compact Mu-Near-Zero Metamaterial Integrated Wideband High-Gain MIMO Antenna for 5G New Radio Applications

Design of an Enhanced Isolation 8-Unit MIMO Antenna for Smartphones Operating in 5G nR and LTE 42 Bands

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