Ion-beam focusing by self-organized axis-symmetric potentials in insulating capillaries
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.98.052704
Abstract: In a combined theoretical and experimental study, we give evidence that the self-organized electric potential in tapered glass capillaries has the strength to focus a low-energy ion beam. Similar to Einzel lenses, the on-axis injected… read more here.
Keywords: self organized; ion beam; beam focusing; axis symmetric ... See more keywords
An Analytical Range-Angle Dependent Beam Focusing Model for Terahertz Linear Antenna Array
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Wireless Communications Letters"
DOI: 10.1109/lwc.2022.3184926
Abstract: This letter considers a scenario in which the Terahertz (THz) transmitter equipped with a linear antenna array wishes to focus its beam to a desired spatial region in the array near-field. The goal is to… read more here.
Keywords: spatial region; beam focusing; linear antenna; array ... See more keywords
Deep Learning of Near Field Beam Focusing in Terahertz Wideband Massive MIMO Systems
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Wireless Communications Letters"
DOI: 10.1109/lwc.2022.3233566
Abstract: Employing large antenna arrays and utilizing large bandwidth have the potential of bringing very high data rates to future wireless communication systems. However, this brings the system into the near-field regime and also makes the… read more here.
Keywords: near field; field beam; deep learning; beam focusing ... See more keywords
Beam Focusing for Near-Field Multi-User MIMO Communications
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Wireless Communications"
DOI: 10.1109/twc.2022.3158894
Abstract: Large antenna arrays and high-frequency bands are two key features of future wireless communication systems. The combination of large-scale antennas with high transmission frequencies often results in the communicating devices operating in the near-field (Fresnel)… read more here.
Keywords: beam focusing; antenna; field; multi user ... See more keywords
Controllable terahertz beam focusing and rotating by graphene-assisted microring metasurfaces
Sign Up to like & getrecommendations! Published in 2023 at "Optical Engineering"
DOI: 10.1117/1.oe.62.4.045101
Abstract: Abstract. This research proposes a terahertz (THz) metalens for focusing THz waves with an electrically controllable focal length. The dynamic of tuning of THz metalenses with graphene provides high controllability, fast responses, and compact structures… read more here.
Keywords: graphene; thz; controllable terahertz; focal length ... See more keywords
Ultracompact metalens-based beam-focusing fiber-optic device with a large numerical aperture.
Sign Up to like & getrecommendations! Published in 2023 at "Optics letters"
DOI: 10.1364/ol.481037
Abstract: Conventional optical fibers have good light conduction and transmission properties, and have been widely used in the fields of long-distance fiber-optic communication and sensing. However, due to the dielectric properties of the fiber core and… read more here.
Keywords: fiber optic; fiber; beam focusing; focusing fiber ... See more keywords
BEAM FOCUSING COMPACT WIDEBAND ANTENNA LOADED WITH MU-NEGATIVE METAMATERIAL FOR WIRELESS LAN APPLICATION
Sign Up to like & getrecommendations! Published in 2018 at "Progress in Electromagnetics Research C"
DOI: 10.2528/pierc18012908
Abstract: This article proposes a beam focusing compact wideband microstrip antenna loaded with mu-negative (MNG) metamaterials. The antenna is designed to operate in the frequency spectra of IEEE 802.11a wireless LAN 5.15–5.85 GHz. The controlling of… read more here.
Keywords: compact wideband; beam focusing; antenna; antenna loaded ... See more keywords