Results 21 to 30 of about 758,632 (333)

A Compact Planar Ultra-Wideband Array Antenna

open access: yesInternational Journal of Antennas and Propagation, 2023
Ultra-wideband (UWB) antennas have recently gained prominence in communication, radar technology, and electronic warfare domains. The quick development of these antennas is due to the wide bandwidth requirements of pulse radar, ground penetrating radar ...
Junli Zhu   +3 more
doaj   +1 more source

Ultra-wideband tunable metamaterial perfect absorber based on vanadium dioxide.

open access: yesOptics Express, 2021
A dynamically adjustable ultra-wideband metamaterial perfect absorber (MPA) is proposed which consists of three resonance rings based on vanadium dioxide (VO2) and a metal ground layer separated by a dielectric spacer.
Guozhang Wu   +5 more
semanticscholar   +1 more source

Ultra-Wideband Antennas for Biomedical Imaging Applications: A Survey

open access: yesItalian National Conference on Sensors, 2022
Microwave imaging is an active area of research that has garnered interest over the past few years. The main desired improvements to microwave imaging are related to the performances of radiating systems and identification algorithms.
U. Rafique   +4 more
semanticscholar   +1 more source

Integrated Coherent Tunable Laser (ICTL) With Ultra-Wideband Wavelength Tuning and Sub-100 Hz Lorentzian Linewidth

open access: yesJournal of Lightwave Technology, 2022
This paper describes the design, fabrication, and record performance of a new class of ultra-wideband wavelength tuning, ultra-low noise semiconductor laser, the Integrated Coherent Tunable Laser (ICTL). The ICTL device is designed for, and fabricated in,
P. Morton   +8 more
semanticscholar   +1 more source

An ultra-wideband orthogonal-beam directional graphene-based antenna for THz wireless systems

open access: yesScientific Reports, 2022
In terahertz (THz) wireless systems, graphene shows a tremendous promise for the implementation of miniaturized and reconfigurable antennas due to its unique tunable property. This paper presents a wideband beam reconfigurable directional antenna for THz
Sasmita Dash   +3 more
semanticscholar   +1 more source

UWB’s Big Leap: The Niche Tech Set to Disrupt IoT Connectivity [PDF]

open access: yesAnnals of Dunarea de Jos University. Fascicle I : Economics and Applied Informatics
With a history of over two centuries, ultra-wideband seems to be on the verge of influencing the IoT and revolutionizing how devices communicate with each other. Unlike other technologies, Ultra-Wideband does not seem to be the technology that will solve
Dan-Alex Ceausescu-Constantinescu   +1 more
doaj   +1 more source

Compact UWB Monopole for Multilayer Applications [PDF]

open access: yes, 2006
A novel compact, dual layer UWB monopole antenna is presented. This low profile ultra-wideband antenna is fed by a 50 ? shielded strip-line with an array of metal vias making the conducting walls.
Bai, Qiang   +3 more
core   +1 more source

Measurement-based analysis of Doppler characteristics for ultra-wideband radio channels in an office environment [PDF]

open access: yes, 2014
In this work, an analysis of the Doppler characteristics for Ultra-Wideband indoor communication is presented. Channel sounding measurements ranging from 3.1 to 10.6 GHz were performed over the course of several days in an occupied office environment ...
Hanssens, Brecht   +4 more
core   +1 more source

SIW cavity-backed slot (multi-)antenna systems for the next generation IoT applications [PDF]

open access: yes, 2016
Substrate integrated waveguide (SIW) cavity-backed slot antenna topologies are promising candidates to adress the specific design challenges posed by the Internet of Things (IoT).
Bozzi, M   +5 more
core   +1 more source

Comparison and Improvement of 3D-Multilateration for Solving Simultaneous Localization of Drones and UWB Anchors

open access: yesApplied Sciences, 2023
Drone fleets have attracted a lot of attention from the research community in recent years. One of the biggest challenges in deploying such systems is localization.
Franck Malivert   +2 more
doaj   +1 more source

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