Dual-Band Closed-Slot MIMO Antenna for Terminal Wireless Applications

Wang, Chao; Wang, Hanyang; Wu, Pengfei; Hou, Meng

doi:10.1109/tap.2022.3161531

Cited by 13 publications

(10 citation statements)

References 30 publications

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“…The growing advancement of high-speed modern communication systems, such as fifth generation (5G) communications, has triggered a new area of research for enhancing the system capacity and achieving multipath communications [ 1 , 2 , 3 ]. 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 ].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

“…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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“…As a result, the characteristics of many antennas installed in mobile communications devices are evolving into smaller sizes and lower profiles. Several multiple input, multiple output (MIMO) multiantenna systems for mobile devices and 5G applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ] have been continuously proposed with the rapid spread of 5G MIMO technology, which also include the 5G MIMO multiantenna systems for mobile phones. In these systems, multiple antennas are configured at appropriate distances to maintain a certain degree of isolation.…”

Section: Introductionmentioning

confidence: 99%

“…In these systems, multiple antennas are configured at appropriate distances to maintain a certain degree of isolation. The spacing between the antennas in them is about 10–30 mm [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Some designs incorporate isolation elements to optimize the degree of isolation between antennas [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Compact Sub 6 GHz Slot Multiantenna System for 5G Laptops

Chen

Cheng

et al. 2023

Micromachines

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A sub 6 GHz dual-band closed-slot multiantenna system for 5G laptops is proposed in this paper. It was installed in a clearance space, with dimensions og 217 × 3 mm2 and 1 mm away from the upper edge of the screen ground plane. The dimensions of the clearance space were the same as those of a multisystem consisting of six antennas. The dimensions of the single closed-slot antenna were 32 × 3 mm2 (0.368 λ × 0.034 λ, where λ equals the free-space wavelength of 3450 MHz. The antenna was coupled to an asymmetric T-shaped feed-in section equipped with a chip capacitor for exciting one-half and full wavelength resonance modes of the closed-slot to encompass sub 6 GHz 3300–3600 MHz and 4800–5000 MHz dual-band operations. The design of the antenna features a long and straight slot to generate the high-order mode of the closed slot in the high-frequency (4800–5000 MHz) band (not the low-frequency (3300–3600 MHz) multiplier band). Its structure is simple, and the width of its slot is only 3 mm. The antennas were arranged to be 5 mm apart in the same direction and in parallel to form a six-antenna system in order to utilize the weak electric fields located at the two closed ends of the closed-slot structure when the closed slot was excited. It showed excellent envelope correlation coefficients (ECCs) and isolation performance without the installation of isolation elements. The measured fractional bandwidth of the antenna was 10.15% and 6.73% at the center frequencies of 3450 MHz and 4900 MHz, respectively. Its measured isolation was always over 10 dB, and the efficiency was between 46% and 76%. The ECCs of the system calculated from the measured complex E-field radiation pattern were all below 0.2, which means that it is ideal for use in laptop devices with a high screen-to-body ratio and a metal back cover.

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“…In fact, several literatures about the multi-band MIMO antenna pair have already been published to cover the different operating frequency bands in mobile devices. [20][21][22][23][24][25] Among these literatures, several papers suggest that a frequency reconfigurable technology could be a feasible way to achieve the wanted multi-band property, which is usually realized with the help of positive-intrinsic-negative (PIN) diodes. [22][23][24][25] Though these already designed frequency reconfigurable antenna pairs function well, they have relatively large sizes and might be compressed further.…”

Section: Introductionmentioning

confidence: 99%

Compact frequency reconfigurable MIMO antenna pair with high isolation for 5G mobile applications

Zhao

Wang

2022

Int J RF Mic Comp-Aid Eng

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This article presents a design of compact frequency reconfigurable dual-port antenna pair with high isolation for 5G mobile devices. Two feeding ports are located side by side and share a common radiator within a small area of 11.5 mm Â 6 mm in the proposed antenna pair. The feeding ports achieve a self-decoupling characteristic without any additional decoupling structure based on a synthesis of common and differential modes in the shared radiator.Moreover, the antenna pair has a frequency reconfigurable property and can operate in both 3.5 GHz and 5 GHz bands by switching PIN diodes. A prototype multiple-input-multiple-output (MIMO) antenna composed of four designed antenna pair is fabricated and tested. The experimental results show that the antenna pair can operate in both the frequency bands and has peak isolations of 26 dB in 3.5 GHz band and 27 dB in 5 GHz band. The antenna efficiencies are around 60% at 3.5 GHz and about 80% at 5 GHz respectively. The proposed antenna pair can be a promising candidate for 5G applications.

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Dual-Band Closed-Slot MIMO Antenna for Terminal Wireless Applications

Cited by 13 publications

References 30 publications

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

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

Compact Sub 6 GHz Slot Multiantenna System for 5G Laptops

Compact frequency reconfigurable MIMO antenna pair with high isolation for 5G mobile applications

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