Broadband MIMO Antenna System for 5G Operations in Mobile Phones

Zhao, Anping; Ren, Zhouyou; Wu, Shengde

doi:10.1002/mmce.21857

Cited by 23 publications

(23 citation statements)

References 20 publications

(84 reference statements)

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“…Last but not least, the ECCs between adjacent antennas have also been calculated from far‐field patterns to assess MIMO performance of the presented antenna system 18 . As shown in Figure 9, simulated (gray curves) and measured (color curves) values are all less than 0.16 within the frequency of interest, which are practically good for MIMO applications.…”

Section: Resultsmentioning

confidence: 99%

Compact three‐antenna MIMO system based on triangular half‐mode substrate‐integrated‐waveguide cavity

Niu

Tan

2020

Int J RF Microw Comput Aided Eng

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A compact three‐antenna MIMO system based on a triangular half‐mode SIW cavity is proposed. Two isosceles‐right cavity edges are shorted by metallic vias while a hypotenuse is opened to radiate cavity energy into the air. By etching two T‐shaped slots and adopting coaxial feedings, three antennas are formed. The same operating frequencies are achieved by adjusting the position of these slots and high isolation is obtained by optimizing their length. The proposed design has attractive features of simple configuration and compact size, which is completely printed on a single‐layered substrate without external circuitries. A prototype with the overall size of 0.53λ0 × 0.53λ0 has been fabricated. Measured results exhibit the operating frequencies of about 3.51 GHz, high isolation of 16.0 dB, moderate gain of around 4.12 dBi, good radiation efficiency of 81.22%, and low envelope correlation coefficient of 0.16.

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Section: Resultsmentioning

confidence: 99%

Compact three‐antenna MIMO system based on triangular half‐mode substrate‐integrated‐waveguide cavity

Niu

Tan

2020

Int J RF Microw Comput Aided Eng

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“…As can be seen from Figure 9, the ECC value in the covered frequency band is less than 0.03 and is close to 0 at 3.5-5 GHz; therefore, the terminal system has good diversity characteristics. Compared with other studies on MIMO antennas as in Table 2 [7,110,[12][13][14][15], the proposed antenna system has certain advantages over other studies in not only bandwidth but also ECC. The introduction of a decoupling structure in a limited space greatly reduces the coupling between the antennas.…”

Section: Mimo Efficiency and Performancesmentioning

confidence: 87%

An Improved Loop Ultra-Wideband Mimo Antenna System for 5g Mobile Terminals

Yu¹,

Wang²,

Xie³

2020

PIER Letters

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An eight-element ultra-wideband multiple-input multiple-output antenna system is proposed for the 5G mobile terminals. Each radiating branch is composed of a Loop and a monopole antenna. The ultra-wideband characteristics of the antenna are obtained by a T-shaped feed branch coupling a radiation branch. Furthermore, the isolation is lower than −15 dB by introducing a Tshaped neutralization line structure. The results of simulation and measurement show that the antenna system can cover 3.3-5.6 GHz, and the antenna efficiency is 45%-80%. At the same time, the envelope correlation coefficient between any two elements is lower than 0.03. Therefore, the proposed antenna in this study is very suitable for the eight-element MIMO antenna system as a reference.

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“…The antenna design process starts with the zeroth order of iteration of an equilateral triangle with side length, s, calculated for a resonant frequency of 6.8 GHz using Equations (1)(2)(3)(4)…”

Section: Complementary Sierpinski Gasket Fractal Antenna Array Designmentioning

confidence: 99%

“…3 Apart from the magnificent features of the 5G cellular networks, these devices suffer from a limitation of power penetration losses due to the fading and weaker signal strength in the process of data transmission when a single antenna is used at a transmitter and receiver side. 4 To overcome this problem, the 5G devices are preferably implemented using UWB multiple-input multipleoutput (MIMO) systems with multiple antennas at the transmitter and receiver side respectively to achieve high data rates and throughput. MIMO antenna systems are used to enhance the capacity of a wireless radio channel and reduce the effect of fading by using diversity combining techniques such as maximal-ratio combining (MRC), equal-gain combining (EGC), and selection combining (SC).…”

Section: Introductionmentioning

confidence: 99%

A complementary Sierpinski gasket fractal antenna array integrated with a complementary Archimedean defected ground structure for portable 4G/5G UWB MIMO communication devices

Sohi

Kaur

2020

Micro & Optical Tech Letters

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This article presents the design, development, and experimental validation of an aperture coupled complementary Sierpinski gasket equilateral triangular fractal antenna array for portable 4G/5G UWB communication devices. The proposed antenna array is printed on two FR-4 substrate layers (ε r = 4.4, height = 1.57 mm, and tan δ = 0.024) with two fractal triangular patches on the top layer (separated by a distance of 3λ/2) and feed network on the bottom layer of FR-4. The fractal patches (optimized up to second order of iteration) are fed using an aperture-coupled feeding mechanism, where the aperture slots in the ground layer are modified to complementary Archimedean spiral slots which are interconnected by a modified "X" shaped slot to improve the impedance matching at the operational bands. The proposed array has overall volumetric dimensions of 41 × 99.4 × 3.245 mm 3 and provides a size reduction of 46% for the metallic area using the fractal geometry. The proposed array shows a simulated UWB response from 4.3 to 11.6 GHz (fractional bandwidth of 91.8% at 7.95 GHz) with a simulated peak gain of 4.7 dB (at 9.2 GHz) and port-to-port isolation of ≤−15.8 dB for the entire band. For validation of simulated responses, the proposed array is fabricated and tested for S-parameters (S 11 , S 22, S 12 , and S 21 ). A measured impedance bandwidth of 6.3 GHz is observed for a frequency band from 5.7 to 12 GHz. Two additional frequency bands are also exhibited by the array from 4.1 to 4.25 GHz and 4.7 to 5.3 GHz. The array diversity parameters such as envelope correlation coefficient (≤0.007 [simulated], ≤0.0057 [measured]), diversity gain (≥9.999 [simulated], ≥9.971 [measured]), mean effective gain (≥−3.9 dB [simulated], ≥−5.1 dB [measured]), and channel capacity loss, (≤0.37 bits/s/Hz [simulated], ≤0.4 bits/s/ Hz [measured]) which are calculated using the simulated and measured S-parameters of the array are also observed. These parameters allow the proposed fractal array to be implemented in a diversity combining technique to improve the overall SNR and hence support a high data rate for 4G/5G multimedia services. K E Y W O R D S aperture coupled feed, complementary Archimedean spiral, complementary Sierpinski gasket fractal, multiple-input multiple-output (MIMO), UWB

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Broadband MIMO Antenna System for 5G Operations in Mobile Phones

Cited by 23 publications

References 20 publications

Compact three‐antenna MIMO system based on triangular half‐mode substrate‐integrated‐waveguide cavity

Compact three‐antenna MIMO system based on triangular half‐mode substrate‐integrated‐waveguide cavity

An Improved Loop Ultra-Wideband Mimo Antenna System for 5g Mobile Terminals

A complementary Sierpinski gasket fractal antenna array integrated with a complementary Archimedean defected ground structure for portable 4G/5G UWB MIMO communication devices

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