Results 21 to 30 of about 536,235 (301)

Development of scanning narrow beam riometer

open access: yesAntarctic Record, 1989
A new riometer system of high spatial resolution by means of a scanning narrow beam method is in operation at Syowa Station, Antarctica (69.0°S, 36.6°E, L=6.1) since February 1985.
Hisao Yamagishi, Takashi Kikuchi
doaj   +1 more source

Enhanced resistance of single-layer graphene to ion bombardment [PDF]

open access: yes, 2010
We report that single-layer graphene on a SiO_2/Si substrate withstands ion bombardment up to ~7 times longer than expected when exposed to focused Ga^+ ion beam.
Greer, F., Greer, J. R., Lopez, J. J.
core   +1 more source

Rectifying "nanohomo" contacts of W-Ga-C composite pad and nanowire fabricated by focused-ion-beam induced chemical vapour deposition [PDF]

open access: yes, 2005
We prepared W-Ga-C composite contacts on W-Ga-C composite nanowires by focused-ion-beam-induced chemical vapor deposition using a dual-beam scanning electron microscope/focused-ion-beam system.
Li, W, Shen, T
core   +1 more source

Improving the Performance of SIW-based Leaky Wave Antenna using the Creation of an Entrance Hole [PDF]

open access: yesInternational Journal of Research and Technology in Electrical Industry
In this paper, the effect of input holes on the performance of leaky wave antennas(LWA) is investigated by presenting two designs based on the substrate integrated waveguide(SIW) structure.
Heshmat Noori, Seyed Vahab Al-Din Makki
doaj   +1 more source

Ultrathin Dual‐Band Wide‐Angle Beam Scanning Metalens Based on High‐Efficiency Meta‐Atom

open access: yesAdvanced Photonics Research, 2022
Metasurfaces composed of planar subwavelength‐scaled meta‐atoms demonstrate unprecedented wavefront manipulation capabilities. However, the wavelength‐dependent property of the metasurface could severely reduce the design freedom, and most metasurfaces ...
Shuobo Wang   +4 more
doaj   +1 more source

A Wide-band Leaky-Wave Antenna based on Spoof Surface Plasmon Polaritons

open access: yesGuangtongxin yanjiu, 2021
In order to solve the problem of limited bandwidth and large overall size of leaky-wave antenna, a new wide-band leaky-wave antenna is proposed in this paper.
Yu-kun BAI, Bo CHAI, Hong-xing ZHENG
doaj   +1 more source

Single-Side-Scanning Surface Waveguide Leaky-Wave Antenna Using Spoof Surface Plasmon Excitation

open access: yesIEEE Access, 2018
A surface waveguide (SWG) leaky-wave antenna featuring directional single-side beam scanning capability is presented. A novelty of the design is that transition design utilizes the spoof surface plasmon (SSP) as an intermedia to feed the SWG, which ...
Shangkun Ge   +4 more
doaj   +1 more source

A Photonically-Excited Leaky-Wave Antenna Array at E-Band for 1-D Beam Steering

open access: yesApplied Sciences, 2020
This manuscript reports the first leaky-wave antenna (LWA) array excited by a photomixer as well as its potential application for alignment in wireless links.
Álvaro J. Pascual-Gracia   +7 more
doaj   +1 more source

Ion beam micromachining of integrated optics components [PDF]

open access: yes, 1973
Thin film integrated optics components such as light guides, modulators, directional couplers, and polarizers demand high quality edge smoothness and high resolution pattern formation in dimensions down to submicrometer size.
Garmire, E.   +4 more
core   +1 more source

Dual-Polarized Multi-Beam Fixed-Frequency Beam Scanning Leaky-Wave Antenna

open access: yesSensors, 2023
A fixed-frequency beam-scanning leaky-wave antenna (LWA) array with three switchable dual-polarized beams is proposed and experimentally demonstrated. The proposed LWA array consists of three groups of spoof surface plasmon polaritons (SPPs) LWAs with ...
Dapeng Chu   +4 more
doaj   +1 more source

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