Results 61 to 70 of about 776,777 (280)
Large‐Area Flat Optics Color Routing in Tilted Arrays of 2D Semiconductor Nanostripes
Advanced Optical Materials, EarlyView.We develop a scalable flat optics platform exploiting self‐organised ion‐beam sputtering and maskless glancing‐angle deposition to fabricate centimetre‐scale arrays of tilted MoS2 nanostripes. The engineered geometry activates Rayleigh anomalies, guided modes, and Mie resonances, enabling highly directional color routing and enhanced light harvesting ...
Simone Di Marco +7 more
wiley +1 more source
Design of Ultra Wideband Antenna
International Journal of Recent Technology and Engineering (IJRTE), 2020 In this paper, A coplanar waveguide (CPW) ultra-wideband(UWB) antenna is designed, analyzed and simulated by computer simulation technology(CST). The proposed antenna is fabricated on FR-4 dielectric substrate. A microstrip feed line is used to excite the antenna.The ground plane is slotted to improve the impedance bandwidth (BW).
Anjaneyulu Katuru*, Sudhakar Alapati
openaire +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
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
On the design of tree-type ultra wideband fractal Antenna for DS-CDMA system
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsThis article describes the CPW-feed ultra wideband tree type monopole fractal antenna and it’s backscattering. The prototype antenna is fabricated with optimized dimension.
Raj Kumar, Prem Narayan Chaubey
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
Sensors, 2019 The paper presents a highly efficient, low cost, ultra-wideband, microstrip monopole antenna for microwave imaging and wireless communications applications.
Shahid Ullah +4 more
doaj +1 more source
High‐Stress Si3N4 Reflective Membranes Monolithically Integrated With Cavity Bragg Mirrors
Advanced Optical Materials, EarlyView.Silicon nitride membranes are record‐breaking mechanical sensors, yet their delicate fabrication and alignment into precision optical cavities have confined them to the laboratory. A monolithic process directly integrates suspended high‐stress Si3N4${\rm Si}_{3}{\rm N}_4$ membranes onto Bragg mirrors, forming self‐aligned optomechanical cavities in ...
Megha Khokhar +3 more
wiley +1 more source
Jurnal Teknologi dan Sistem Komputer, 2018 This paper presents a new approach in designing an ultra wideband minimum dispersion antenna optimally to avoid the degradation of broadband communications system performance.
Joko Suryana
doaj +1 more source
Ultra-wideband radio signals distribution in FTTH networks [PDF]
, 2008 The use of an ultra-wideband (UWB) radio technique is proposed as a viable solution for the distribution of high-definition audio/video content in fiber-to-the-home (FTTH) networks.
Roberto Llorente +13 more
core +1 more source