5G NR FR2 Femtocell Coverage Map Using an Omnidirectional Twisted SWAA

Filgueiras, H.R.D.; Lima, Eduardo Saia; Brandão, T. H.; Cerqueira, S. Arismar

doi:10.1109/ojap.2020.3044460

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…Our research group from the Laboratory Wireless and Optical Convergent Access (WOCA) has been intensely contributing to the development of mmWaves antennas for 5G in the past few years, as complied in Table 1 [22], [75], [76], [77], [79], [80], [81], [82] and illustrated by prototypes shown in Figure 4. In 2017, da Costa et al have reported the first optically controlled reconfigurable slotted-waveguide antenna array (SWAA) (Fig.…”

Section: Antenna Technologies For Sub-6 Ghz and Mmwavesmentioning

confidence: 99%

“…Experimental results have demonstrated 1.09 GHz bandwidth centered at 24 GHz (4.54% fractional bandwidth), gain up to 14.71 dBi over the operating bandwidth and only 2.7 dB gain variation in the azimuth plane. Such novel SWAA is promising for mmWaves applications, including 5G eMBB communications in indoor scenarios, as demonstrated in in 2021, as a result of its implementation in a 91-m 2 indoor femtocell [82].…”

Section: Antenna Technologies For Sub-6 Ghz and Mmwavesmentioning

confidence: 99%

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Wireless and Optical Convergent Access Technologies Toward 6G

Filgueiras¹,

Lima

Cunha

et al. 2023

IEEE Access

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The sixth generation of mobile communication (6G) systems is recently rising a lot of interest, introducing new futuristic and challenging use cases that will demand much more than just communications to become a reality. Higher throughput, lower latencies, higher number of connections will push the requirement of the future mobile networks to a new level, but also sensing, positioning and imaging will play an important role in the new foreseen use cases. The integration of techniques developed for wireless communications with those conceived for optical links will be essential to provide the infrastructure for the 6G networks. In this context, this paper presents a review on wireless and optical convergent access solutions towards the 6G systems. The manuscript brings the use cases, requirements and enablers for 6G networks including a discussion about the state-of-the-art on THz and sub-THz communications, wireless and optical convergence, visible light communication, integrated and free-space optics, new antenna designs, powerover-fiber deployments and the use of machine learning in the physical layer of future networks. By reviewing the most relevant contributions available in the literature for wireless and optical communications and presenting their main contributions, this paper clearly shows that, more than a technological trend, the convergence of wireless and optical technologies is a fundamental step towards the development of the 6G network infrastructure.

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Section: Antenna Technologies For Sub-6 Ghz and Mmwavesmentioning

confidence: 99%

Section: Antenna Technologies For Sub-6 Ghz and Mmwavesmentioning

confidence: 99%

Wireless and Optical Convergent Access Technologies Toward 6G

Filgueiras¹,

Lima

Cunha

et al. 2023

IEEE Access

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“…The former is a resonant structure with narrow impedance bandwidth, while the latter operates over a wide frequency range. Regarding the resonant SWAAs, our research group has been devoted to proposing techniques to improve SWAA impedance bandwidth [22], [54], by means of applying groups of slots with different electrical lengths, trapezoidal-shaped slots, twisted distribution of slot groups along the array longitudinal axis and slop slots. The slop slots approach [22] has also been exploited in the current work for developing a resonant airfilled rectangular waveguide SWAA with slots milled into its broad wall.…”

Section: Slotted Waveguide Antenna Array Designmentioning

confidence: 99%

31 dBi-Gain Slotted Waveguide Antenna Array Using Wing-Based Reflectors

et al. 2022

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This paper presents a comparison of two gain-enhancement techniques and the development of an extremely high-gain slotted waveguide antenna array (SWAA) aiming at applications in the millimeterwaves (mm-waves). The first technique utilizes pairs of grooved structures surrounding a given primary power source to improve its transmission properties, acting as secondary sources to re-radiate the surface wave energy, whereas the second is based on symmetrical wing-based reflectors. Those techniques and their combination have been applied to an SWAA based on an air-filled metallic rectangular waveguide. The proposed antenna array was designed for operation in the frequency range from 25.5 to 26.5 GHz and excited by a unique coaxial-to-waveguide transition with the TE 10 fundamental mode. These techniques enable us to enhance the gain of the array by up to 10 dB, making it comparable to those of parabolic antennas with similar size apertures. Numerical analyses of the performance-enhanced antenna arrays are presented to validate the design strategies. Experimental results of 27-and 41-slots SWAA prototypes demonstrate the potential of the wing-based reflector technique to improve its aperture efficiency over that of the grooved structures. The 41-slots SWAA prototype provides as high as 31 dBi-gain in the 26 GHz band, ranging from 30.52 to 31.13 dBi within the array impedance bandwidth. Furthermore, since the reflector structures are easily attached to and detached from the SWAA structure, the prototype has the potential to provide both sectoral and directive radiation patterns in the E-plane.INDEX TERMS 5G, antenna, grooved-structures, reflectors and slotted waveguide antenna array.

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