A Compact Dual-Broadband Multiple-Input Multiple-Output (MIMO) Indoor Base Station Antenna for 2G/3G/LTE Systems

Zhao, Yan; Rakluea, Chawalit; Hongnara, Tanan; Chaimool, Sarawuth

doi:10.1109/access.2019.2924022

Cited by 13 publications

(9 citation statements)

References 33 publications

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“…In Ref. [17], for 2G/3G/LTE systems, a dual-broadband MIMO indoor base station antenna was proposed to cover the frequency bands (800-960 MHz) and (1700-2700 MHz). The design has a low profile and simple feeding structure, but only two antenna elements were proposed to achieve MIMO operation and it can't cover higher frequency bands.…”

Section: Introductionmentioning

confidence: 99%

16-ports indoor base station MIMO array for sub-6 GHz 5G applications

Abouelnaga

Zewail²,

Shokair³

2022

Telecommun Syst

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A typical 5G multiple-input and multiple-output (MIMO) system must combine a high number of antennas at both the transmitter and receiver to realize spatial multiplexing capability. In this paper, a wideband 16- element indoor base station (BS) antenna array that can cover 3.3–6.0 GHz is proposed for 5G applications. A π-shaped monopole antenna is designed to cover the Lower band (LTE bands 42/43–N77–N78), the intermediate band (N79), and the higher band (LTE 46). The antenna elements are arranged in a limited space printed on a substrate take the Hexakaidecagon Polygon shape. As the antenna elements are arranged with good isolation, achieving good polarization diversity. The proposed BS array is simulated, fabricated, and tested. The typical results, S-parameters, antenna efficiency, and radiation patterns are investigated. Moreover, to validate the MIMO performances, a very low envelope correlation coefficient (ECC) below 0.02, high antenna efficiency of about 82–93.2% are achieved. The calculated ergodic channel capacity of the 16 × 16 MIMO system reached up to 85 bps/Hz. The proposed antenna array was compared to some other 5G MIMO indoor base station antennas.

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Section: Introductionmentioning

confidence: 99%

16-ports indoor base station MIMO array for sub-6 GHz 5G applications

Abouelnaga

Zewail²,

Shokair³

2022

Telecommun Syst

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“…Two dual-band dual-polarized solutions are detailed in [15]- [16] with the use of an AMC reflector [15] operating at n78/n79 bands with an isolation of 20 dB and a second solution with the use of crossed monopoles [16] operating at n78 and 1.55-2.75 GHz bands. In addition, a dual-band antenna is presented in [17] based on a slotted microstrip patch and two monopoles working at 0.8-9.6 GHz and 1.7-2.7 GHz obtaining an isolation of 18 dB. Lastly a 3-D printed crossed dipoles are presented in [18] providing service to n77/n78/n79 bands with 18 dB isolation.…”

Section: Introductionmentioning

confidence: 99%

Sector Unit-Cell Methodology for the Design of Sub-6 GHz 5G MIMO Antennas

et al. 2022

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A novel methodology based on the sectorization of multiple-port cavities with azimuthal symmetry into sector unit cells is presented to design 5G multiple-input multiple-output (MIMO) sub-6 GHz antennas. The methodology divides an N-port cavity antenna into N unit cells and predicts the performance of the N-port design with the analysis of two adjacent cells. This approximation reduces the time and complexity of the simulation of cavity antennas with a high number of ports. For the theoretical justification, cavity mode analysis of a closed cavity and characteristic modes analysis of open and sector cavities is addressed. With the use of the proposed methodology, five different cavity designs with circular, square, hexagonal, octagonal, and saw-tooth geometries are presented in this article. In addition, the fabrication of the 4-port circular shape design and its MIMO performance is also studied. Results show an impedance bandwidth of 130% (1.27-6 GHz), and an envelope correlation coefficient (ECC) lower than 0.1.INDEX TERMS 5G antenna, MIMO antenna, sub 6-GHz, wide-band antenna, 5G MIMO access point.

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“…MIMO operation requires multiple port antennas with highly isolated ports and independent radiation patterns with a low Envelope Correlation Coefficient (ECC) between them. A compact dualbroadband (0.8-0.9 GHz, 1.7-2.7 GHz) MIMO antenna composed by a microstrip patch with slots and two monopoles for 2G/3G/4G/5G systems is presented in [7]. In addition, a fourport wide-band annular-ring patch antenna has recently been proposed in [8], working at 3.3-5 GHz band.…”

Section: Introductionmentioning

confidence: 99%

Four-Port Wide-Band Cavity-Backed Antenna With Isolating X-Shaped Block for Sub-6 GHz 5G Indoor Base Stations

et al. 2021

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A four-port wideband cavity-backed antenna is presented for indoor base stations applications. The antenna is composed of a square open cavity with an X-shaped isolating block and 4 feeding monopoles symmetrically and orthogonally arranged in the aperture of the cavity. A novel methodology based on Characteristic Modes Analysis (CMA) is used for identifying the modes which are contributing to the coupling. As a result of this analysis, an X-shaped isolating block placed at the center of the cavity is proposed for increasing the isolation between ports. A wide-band four-port antenna with unidirectional radiation patterns is obtained with a measured impedance bandwidth (S 11 <-10 dB) ranging from 1.55 to 6 GHz (118%), covering most of the sub-6 GHz 5G bands. The proposed antenna provides four independent radiation patterns, with 16 dB of measured minimum isolation between ports and an efficiency higher than 84%. Multiple-input multiple-output (MIMO) compatibility is confirmed with a 4×4 MIMO simulated system with an envelope correlation coefficient (ECC)<0.5 in different propagation conditions. The antenna is easy to fabricate and presents a compact size of 129.5×129.5×28.2 mm 3 (0.68λ×0.68λ×0.15λ, at a frequency f=f min =1.55 GHz). Moreover, the antenna has the advantage of avoiding complex feeding structures with baluns or directional couplers.

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A Compact Dual-Broadband Multiple-Input Multiple-Output (MIMO) Indoor Base Station Antenna for 2G/3G/LTE Systems

Cited by 13 publications

References 33 publications

16-ports indoor base station MIMO array for sub-6 GHz 5G applications

16-ports indoor base station MIMO array for sub-6 GHz 5G applications

Sector Unit-Cell Methodology for the Design of Sub-6 GHz 5G MIMO Antennas

Four-Port Wide-Band Cavity-Backed Antenna With Isolating X-Shaped Block for Sub-6 GHz 5G Indoor Base Stations

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