Zobrazeno 1 - 10
of 8 851
pro vyhledávání: '"beam-switching"'
For high-speed train (HST) millimeter wave (mmWave) communications, the use of narrow beams with small beam coverage needs frequent beam switching, while wider beams with small beam gain leads to weaker mmWave signal strength. In this paper, we consi
Externí odkaz:
http://arxiv.org/abs/2411.17990
The growing demand for ultra-fast telecommunications, autonomous driving, and futuristic technologies highlights the crucial role of active beam steering at the nanoscale. This is essential for applications like LiDAR, beam-forming, and holographic d
Externí odkaz:
http://arxiv.org/abs/2410.00806
Electro-optic active metasurfaces have attracted attention due to their ability to electronically control optical wavefront with unprecedented spatiotemporal resolutions. In most studies, such devices require gate arrays composed of a large number of
Externí odkaz:
http://arxiv.org/abs/2409.19956
Autor:
Abanto-Leon, Luis F., Neuder, Robin, Ahmed, Waqar, Saez, Alejandro Jimenez, Jamali, Vahid, Asadi, Arash
Reconfigurable intelligent surfaces (RISs) offer enhanced control over propagation through phase and amplitude manipulation but face practical challenges like cost and power usage, especially at high frequencies. This is specifically a major problem
Externí odkaz:
http://arxiv.org/abs/2410.21506
Publikováno v:
Urban Mass Transit. 2024, Vol. 27 Issue 2, p221-225. 5p.
Publikováno v:
Chengshi guidao jiaotong yanjiu, Vol 27, Iss 2, Pp 221-225 (2024)
[Objective] Due to the diverse components, complex internal structures, and significant deformation risks of straddle monorail beam-switching turnout, issues such as improper component installation, welding-induced thermal deformation, and stress con
Externí odkaz:
https://doaj.org/article/d8953127205a4309994f3943f1ee904a
Publikováno v:
Frontiers in Physics, Vol 12 (2024)
Fast and versatile beam forming and steering technologies are now crucial for various emerging applications, including wireless optical communications and optical switches. However, these technologies often rely on expensive components, such as spati
Externí odkaz:
https://doaj.org/article/a8803794840d406096267c8f00057764
Autor:
Antonio Tarrias, Sebastian B. Damsgaard, Melisa Lopez, Troels B. Sorensen, Preben E. Mogensen, Sergio Fortes, Raquel Barco
Publikováno v:
IEEE Access, Vol 12, Pp 182571-182579 (2024)
Fifth Generation (5G) Millimeter cellular networks are particularly interesting within the Industry 4.0 paradigm. mmWaves provide flexibility to the industrial use case, as well as enable specific application requirements, e.g. robots needing high da
Externí odkaz:
https://doaj.org/article/f024b2e27045495eb3040507b0451508
Publikováno v:
IEEE Access, Vol 12, Pp 43284-43290 (2024)
This paper proposes a design of a multilayer controlled beam horn antenna for the D-band. The multilayer design can achieve easy to control, low cost, and compact structure. The designed structure achieves the effect of a conventional horn antenna by
Externí odkaz:
https://doaj.org/article/fc45ac64bbff4b4d870911bc66207607
Publikováno v:
IEEE Access, Vol 12, Pp 8924-8931 (2024)
This article presents an optimized dual-polarized transmitarray antenna (TA) designed for MIMO applications at the Ka-band, capable of switching beams in two directions. The antenna aperture uses a small unit cell with three layers of Taconic RF-35 d
Externí odkaz:
https://doaj.org/article/6cb798fcfe8f4af699b7372c232466b1