Zobrazeno 1 - 10
of 722
pro vyhledávání: '"beam-switching"'
Publikováno v:
Tongxin xuebao, Vol 45, Pp 10-20 (2024)
In low earth orbit (LEO) satellite constellations, when earth-fixed footprint mode is used, the switching of beams between coverage regions affects the elevation angle of the coverage, which in turn affects the communication quality. A coverage regio
Externí odkaz:
https://doaj.org/article/7dff56cf261b4996b94656c196dc1beb
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
Autor:
Reza Shamsaee Malfajani, Reza Damansabz, Sampada Bodkhe, Daniel Therriault, Jean-Jacques Laurin, Mohammad S. Sharawi
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 5, Pp 1351-1364 (2024)
Shared aperture antennas are versatile structures that can fulfill the demand for multi-band compact antennas in multi-standard emerging communication systems. However, the requirement of operation at widely separated frequency bands, such as sub-6-G
Externí odkaz:
https://doaj.org/article/d4fc31dc3db541caafa46d80d5077dad
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 42949-42960 (2024)
The paper proposes a four-directional beamforming switched antenna system based on Butler matrix for 28 GHz mmWave. It is made up of a 90-degree coupler, a crossover, and a 45-degree phase shifter. A $4\times 4$ Butler matrix is combined with a 28 GH
Externí odkaz:
https://doaj.org/article/6adc7fd585ba4288a175756d7774e0ef
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
Publikováno v:
IEEE Access, Vol 11, Pp 74239-74249 (2023)
This paper presents a design of a two-dimensional (2-D) $6\times 4$ -way hollow waveguide beam-switching matrix working at 28.25 GHz, with a fractional bandwidth of 7.1%. It is the first time that a 2-D one-body hollow waveguide beam-switching matrix
Externí odkaz:
https://doaj.org/article/3d1b3542da1141b1b7b7ab1d6999ad26
Publikováno v:
Photonics, Vol 11, Iss 7, p 611 (2024)
We propose and demonstrate an integrated optical switch that leverages an optical phased array (OPA) and an on-chip metalens, highlighting its potential for efficient and scalable beam switching across multiple ports within a compact footprint. The d
Externí odkaz:
https://doaj.org/article/a34f0ead1da347c48709a51fb334e3d2