Results 61 to 70 of about 624,104 (285)
Advanced Optical Materials, EarlyView.Linearly polarized incident light with normal incidence creates enhanced optical chirality hotspots on the metasurface. Several orders of magnitude optical chirality enhancement offers a promising route toward highly sensitive, compact chiral spectroscopy.
Anastasia Romashkina +10 more
wiley +1 more source
Ultra wideband gigabit powerline communication [PDF]
, 2009 PhDPowerline Communication (PLC) has long been established for low data rate applications by the electric supply companies. Since 1991, the European CENELEC standard EN 50065 has ruled the use of 3 - 148.5KHz frequency range for narrow band PLC ...
Chen, Shuxian
core +4 more sources
Miniaturised ultra‐wideband circular polarised koch fractal crossed dipole array
IET Microwaves, Antennas & PropagationUltra‐wideband (UWB) systems utilise a broad frequency spectrum to achieve high data transmission rates and enhanced precision, creating a demand for specialised UWB antennas.
Won Min Choi +5 more
doaj +1 more source
Design of a novel high gain dual-band common-aperture array antenna
Dianzi Jishu Yingyong, 2019 This paper presents a new ultra-wideband(UWB) high-gain dual-band common-aperture array antenna. The antenna consists of four T-shaped dual-polarized antennas, a 6×6 waveguide slot array antenna, and a circular metal substrate. The dual-polarized antenna
Qiao Xuguang +5 more
doaj +1 more source
Photoluminescent Color Centers on a Mainstream Silicon Photonic Foundry Platform
Advanced Optical Materials, EarlyView.Silicon photonic chips route and process light efficiently but are inherently inefficient at generating it. Here, bright light‐emitting defects, W‐centers, are written into the silicon layer of finished chips from a mainstream commercial foundry: high‐energy ions are implanted straight through the protective oxide and activated by a 250∘C$^\circ{\rm C}$
Prosper Dellah Allo +7 more
wiley +1 more source
Ultra Low-Loss Si Substrate for On-Chip UWB GHz Antennas
IEEE Journal of the Electron Devices Society, 2019 In this paper, measurements and simulations of miniature monopole antennas for ultra-wideband (UWB) GHz intra- and inter-chips communication and biomedical applications are presented.
N. Andre +9 more
doaj +1 more source
Ultra‐wideband antenna system for in‐band full‐duplex applications
IET Microwaves, Antennas & Propagation, 2021 In this study, we present an ultra‐wideband full‐duplex system constituted of a wideband 4‐element Vivaldi array and wideband microstrip‐to‐slotline baluns.
Hadi Hijazi +4 more
doaj +1 more source
Cognospectrum: Spectrum Adaptation and Evolution in Cognitive Ultra-Wideband Radio
, 2005 Cognitive Ultra Wideband (UWB) Radio is proposed to exploit the advantages of combining Cognitive Radio with Ultra Wideband technologies. In order to realize Cognitive UWB Radio, multiple pulse waveform adaptations have been investigated for producing ...
K. Yazdandoost +3 more
core +1 more source
Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity
Advanced Optical Materials, EarlyView.A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio +10 more
wiley +1 more source
Design of Two Compact Wideband Monopoles Through Loading with Linear Approximated Lumped Components
MicromachinesIn this paper, two ultra-wideband monopoles in a colinear structure are presented for application in remote terrestrial communication systems. The antennas consist of a loaded monopole with a hat and an elevated loaded monopole located in the upper ...
Jiansen Ma, Weiping Cao, Xinhua Yu
doaj +1 more source