Compact 5G MIMO Mobile Phone Antennas With Tightly Arranged Orthogonal-Mode Pairs

Sun, Libin; Feng, Haigang; Li, Yue; Zhang, Zhijun

doi:10.1109/tap.2018.2864674

Cited by 243 publications

(187 citation statements)

References 21 publications

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“…It was demonstrated that the proposed antenna system also works well when the two antenna units are located very close to each other. On the other hand, the 1‐mm ground clearance (along the two side edges of the system ground plane) required by the MIMO antenna designs proposed in References is not needed in the proposed antenna system. The obtained high isolation, wide bandwidth, and other unique features can ensure that the proposed MIMO antenna system will be a very good candidate for the 5G mobile applications, especially for mobile phones with full size display and broadband operation.…”

Section: Discussionmentioning

confidence: 99%

Broadband MIMO Antenna System for 5G Operations in Mobile Phones

Zhao

Ren

2019

Int J RF Microw Comput Aided Eng

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A broadband 8‐antenna multiple‐input and multiple‐output (MIMO) system working for 5G new radio N77 (3.3‐4.2 GHz) in mobile terminals is proposed. In particular, each antenna element/unit consists of a monopole‐type meandered branch and an inverted U‐shaped self‐isolated antenna branch; and the antenna unit is fed by the meandered branch. The antenna unit has two resonances generated separately by each branch of the antenna unit. Since the monopole couples strongly with the self‐isolated antenna element that has the inherent self‐isolation characteristics, quite good isolation for the broadband 8‐antenna MIMO system can be obtained. The results such as antenna efficiency, radiation patterns, envelope correlation coefficient, and channel capacity are also presented.

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Section: Discussionmentioning

confidence: 99%

Broadband MIMO Antenna System for 5G Operations in Mobile Phones

Zhao

Ren

2019

Int J RF Microw Comput Aided Eng

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“…Meanwhile, the orthogonal mode method is also proposed in Reference to mitigate the mutual coupling of the tightly arranged pairs; then, an isolation performance, better than 20 dB, implies that the 4 × 4 MIMO system can be a candidate for 5G application. In Reference , a pair of circular ring/open‐ended parasitic structures and polarization diversity technologies are introduced to acquire the characteristics of high isolation and dual polarization.…”

Section: Introductionmentioning

confidence: 99%

A compact pattern diversity MIMO antenna with enhanced bandwidth and high‐isolation characteristics for WLAN/5G/WiFi applications

Yang

Zhou

2020

Micro & Optical Tech Letters

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In this article, a novel multiple input multiple output (MIMO) antenna with compact structure and diverse radiation patterns is designed for a wireless communication device. Four monopole antenna elements are placed orthogonally at the corner of the substrate. A decoupling structure composed of a circular patch and 4 L‐shaped branches placed counterclockwise is printed on the upper surface of the substrate to reduce coupling between antenna elements. Due to the surface current on the circular parasitic patch, which was acquired by coupling with the monopole antenna, the MIMO antenna exhibits an omnidirectional radiation pattern at low frequencies and a directional radiation pattern at high frequencies. In order to verify the accuracy of theoretical analysis and simulated results, the proposed antenna with a compact size of 30 mm × 30 mm is fabricated and measured. The measured results show that the overlapping bandwidths (S11 ≤ −10 dB) are 28.8% from 4.58 to 6.12 GHz and over 4.02 dBi gain. Furthermore, the measured results of pattern diversity are basically consistent with the simulated results, and the measured isolation is up to 15.4 dB, which suggest that the presented antenna can be applied to WLAN/5G/WiFi wireless communication.

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“…Miniaturization of microwave components has become an important design consideration due to the emergence of space‐limited applications, including mobile communications, wearable/implantable devices, sensors, biomedicine, body area networks, and so forth. Compact implementations of microwave circuits can be achieved in various ways; some of the popular techniques include utilization of high‐permittivity substrates, transmission line (TL) folding, employing the slow‐wave phenomenon, in particular, replacing conventional TLs by their shorter counterparts (eg, compact microwave resonant cells, CMRCs), or multilayer realizations (eg, low temperature cofired ceramic technology).…”

Section: Introductionmentioning

confidence: 99%

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

Pietrenko‐Dabrowska

Koziel

2020

Int J RF Microw Comput Aided Eng

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Design of microwave components is an inherently multiobjective task. Often, the objectives are at least partially conflicting and the designer has to work out a suitable compromise. In practice, generating the best possible trade‐off designs requires multiobjective optimization, which is a computationally demanding task. If the structure of interest is evaluated through full‐wave electromagnetic (EM) analysis, the employment of widely used population‐based metaheuristics algorithms may become prohibitive in computational terms. This is a common situation for miniaturized components, where considerable cross‐coupling effects make traditional representations (eg, network equivalents) grossly inaccurate. This article presents a framework for accelerated EM‐driven multiobjective design of compact microwave devices. It adopts a recently reported nested kriging methodology to identify the parameter space region containing the Pareto front and to render a fast surrogate, subsequently used to find the first approximation of the Pareto set. The final trade‐off designs are produced in a separate, surrogate‐assisted refinement process. Our approach is demonstrated using a three‐section impedance matching transformer designed for the best matching and the minimum footprint area. The Pareto set is generated at the cost of only a few hundred of high‐fidelity EM simulations of the transformer circuit despite a large number of geometry parameters involved.

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Compact 5G MIMO Mobile Phone Antennas With Tightly Arranged Orthogonal-Mode Pairs

Cited by 243 publications

References 21 publications

Broadband MIMO Antenna System for 5G Operations in Mobile Phones

Broadband MIMO Antenna System for 5G Operations in Mobile Phones

A compact pattern diversity MIMO antenna with enhanced bandwidth and high‐isolation characteristics for WLAN/5G/WiFi applications

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

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