Results 71 to 80 of about 758,632 (333)
Optics Express, 2020 In this study, we designed a novel ultra-wideband (UWB) absorber and numerically analyzed it to demonstrate that its light absorptivity was greater than 90% in the wavelength range of visible light and near-infrared (405-1505 nm).
Jing Liu +6 more
semanticscholar +1 more source
Color Routing and Beam Steering of Single‐Molecule Emission with a Spherical Silicon Nanoantenna
Advanced Functional Materials, EarlyView.We experimentally demonstrate broadband directional emission from single molecules using a single spherical silicon nanoparticle assembled via DNA origami. By varying nanoparticle (NP) size and emitter position, we achieve unidirectional emission, beam steering, and color routing at the nanoscale, revealing modal interference as the underlying ...
María Sanz‐Paz +9 more
wiley +1 more source
An ultra‐wideband low‐profile antenna for long‐term evolution/5G new radio sub‐6G applications
Electronics Letters, 2022 An ultra‐wideband dual‐polarized antenna with a low profile is proposed for base‐station applications. The dual‐polarized antenna consists of two crossed dipoles, a square patch, and a square meta‐surface.
Yuehui Cui, Zhenxing Tu, RongLin Li
doaj +1 more source
Highly efficient impulse-radio ultra-wideband cavity-backed slot antenna in stacked air-filled substrate integrated waveguide technology [PDF]
, 2018 An impulse-radio ultra-wideband (IR-UWB) cavity-backed slot antenna covering the [5.9803; 6.9989] GHz frequency band of the IEEE 802.15.4a-2011 standard is designed and implemented in an air-filled substrate integrated waveguide (AFSIW) technology for ...
Lemey, Sam +3 more
core +1 more source
Ultra-Wideband Underwater Backscatter via Piezoelectric Metamaterials
Conference on Applications, Technologies, Architectures, and Protocols for Computer Communication, 2020 We present the design, implementation, and evaluation of U2B, a technology that enables ultra-wideband backscatter in underwater environments. At the core of U2B's design is a novel metamaterialinspired transducer for underwater backscatter, and ...
R. Ghaffarivardavagh +3 more
semanticscholar +1 more source
Beyond the Edge: Charge‐Transfer Excitons in Organic Donor‐Acceptor Cocrystals
Advanced Functional Materials, EarlyView.Complex excitonic landscapes in acene–perfluoroacene cocrystals are unveiled by polarization‐resolved optical spectroscopy and many‐body theory. This systematic study of a prototypical model system for weakly interacting donor–acceptor compounds challenges common views of charge‐transfer excitons, providing a refined conceptual framework for ...
Sebastian Anhäuser +6 more
wiley +1 more source
A Compact Planar Monopole UWB MIMO Antenna for Short-Range Indoor Applications
Sensors, 2023 A compact, four-element planar MIMO (Multiple Input, Multiple Output) antenna that operates in an ultra-wideband is presented for diversity application.
Shanmugam Kolangiammal +2 more
doaj +1 more source
Ultra-wideband THz/IR Metamaterial Absorber based on Doped Silicon
, 2018 Metamaterial-based absorbers have been extensively investigated in the terahertz (THz) range with ever increasing performances. In this paper, we propose an all-dielectric THz absorber based on doped silicon.
Danhua Peng +5 more
core +1 more source
Accurate position tracking with a single UWB anchor
, 2020 Accurate localization and tracking are a fundamental requirement for robotic applications. Localization systems like GPS, optical tracking, simultaneous localization and mapping (SLAM) are used for daily life activities, research, and commercial ...
Beltrame, Giovanni +4 more
core +1 more source
Non-contact diagnosis of obstructive sleep apnea using impulse-radio ultra-wideband radar
Scientific Reports, 2020 While full-night polysomnography is the gold standard for the diagnosis of obstructive sleep apnea, its limitations include a high cost and first-night effects.
Sun Kang +6 more
semanticscholar +1 more source